Juraj Hromkovic
According to our database1,
Juraj Hromkovic
authored at least 187 papers
between 1981 and 2018.
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Homepages:
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at zbmath.org
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at isni.org
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at id.loc.gov
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at d-nb.info
On csauthors.net:
Bibliography
2018
Online Graph Coloring Against a Randomized Adversary.
Int. J. Found. Comput. Sci., 2018
2017
How to convince teachers to teach computer science even if informatics was never a part of their own studies.
Bulletin of the EATCS, 2017
Algorithmic Thinking from the Start.
Bulletin of the EATCS, 2017
XLogoOnline: A Single-Page, Browser-Based Programming Environment for Schools Aiming at Reducing Cognitive Load on Pupils.
Proceedings of the Informatics in Schools: Focus on Learning Programming, 2017
The Computer Science Way of Thinking in Human History and Consequences for the Design of Computer Science Curricula.
Proceedings of the Informatics in Schools: Focus on Learning Programming, 2017
What One Has to Know When Attacking P vs. NP (Extended Abstract).
Proceedings of the Fundamentals of Computation Theory - 21st International Symposium, 2017
2016
The Complexity of Paging Against a Probabilistic Adversary.
Proceedings of the SOFSEM 2016: Theory and Practice of Computer Science, 2016
Online Graph Coloring with Advice and Randomized Adversary - (Extended Abstract).
Proceedings of the SOFSEM 2016: Theory and Practice of Computer Science, 2016
On the Power of Laconic Advice in Communication Complexity.
Proceedings of the SOFSEM 2016: Theory and Practice of Computer Science, 2016
Advice Complexity of the Online Search Problem.
Proceedings of the Combinatorial Algorithms - 27th International Workshop, 2016
Combining the Power of Python with the Simplicity of Logo for a Sustainable Computer Science Education.
Proceedings of the Informatics in Schools: Improvement of Informatics Knowledge and Perception, 2016
2015
Corrigendum to "On the approximability and hardness of minimum topic connected overlay and its special instances" [Theoret. Comput. Sci. 429(2012) 144-154].
Theor. Comput. Sci., 2015
Why the Concept of Computational Complexity is Hard for Verifiable Mathematics.
Electronic Colloquium on Computational Complexity (ECCC), 2015
Homo Informaticus.
Bulletin of the EATCS, 2015
On the Size of Two-Way Reasonable Automata for the Liveness Problem.
Proceedings of the Developments in Language Theory - 19th International Conference, 2015
2014
On the advice complexity of the online L(2, 1)-coloring problem on paths and cycles.
Theor. Comput. Sci., 2014
On the Power of Advice and Randomization for the Disjoint Path Allocation Problem.
Proceedings of the SOFSEM 2014: Theory and Practice of Computer Science, 2014
A Technique to Obtain Hardness Results for Randomized Online Algorithms - A Survey.
Proceedings of the Computing with New Resources, 2014
2013
Determinism vs. Nondeterminism for Two-Way Automata: Representing the Meaning of States by Logical Formulæ.
Int. J. Found. Comput. Sci., 2013
The String Guessing Problem as a Method to Prove Lower Bounds on the Advice Complexity.
Proceedings of the Computing and Combinatorics, 19th International Conference, 2013
On the Advice Complexity of the Online L(2, 1)-Coloring Problem on Paths and Cycles.
Proceedings of the Computing and Combinatorics, 19th International Conference, 2013
2012
On the approximability and hardness of minimum topic connected overlay and its special instances.
Theor. Comput. Sci., 2012
Steiner tree reoptimization in graphs with sharpened triangle inequality.
J. Discrete Algorithms, 2012
Determinism vs. Nondeterminism for Two-Way Automata - Representing the Meaning of States by Logical Formulæ.
Proceedings of the Developments in Language Theory - 16th International Conference, 2012
Online Coloring of Bipartite Graphs with and without Advice.
Proceedings of the Computing and Combinatorics - 18th Annual International Conference, 2012
On the Power of Randomness versus Advice in Online Computation.
Proceedings of the Languages Alive, 2012
Einführung in die Programmierung mit LOGO - Lehrbuch für Unterricht und Selbststudium (2. Aufl.).
Vieweg+Teubner, ISBN: 978-3-8348-2266-6, 2012
2011
Fehlerkorrigierende Codes - Ein Unterrichtsbeispiel zum gelenkten entdeckenden Lernen.
LOG IN, 2011
Editorial.
Journal of Interconnection Networks, 2011
On the Hardness of Reoptimization with Multiple Given Solutions.
Fundam. Inform., 2011
On the Approximability of Minimum Topic Connected Overlay and Its Special Instances.
Proceedings of the Mathematical Foundations of Computer Science 2011, 2011
Why Teaching Informatics in Schools Is as Important as Teaching Mathematics and Natural Sciences.
Proceedings of the Informatics in Schools. Contributing to 21st Century Education, 2011
Knowing All Optimal Solutions Does Not Help for TSP Reoptimization.
Proceedings of the Computation, 2011
Improved Approximations for Hard Optimization Problems via Problem Instance Classification.
Proceedings of the Rainbow of Computer Science, 2011
2010
On probabilistic pushdown automata.
Inf. Comput., 2010
Preface.
Fundam. Inform., 2010
Information Complexity of Online Problems.
Proceedings of the Mathematical Foundations of Computer Science 2010, 2010
Algorithmics - Is There Hope for a Unified Theory?
Proceedings of the Computer Science, 2010
The Steiner Tree Reoptimization Problem with Sharpened Triangle Inequality.
Proceedings of the Algorithms and Complexity, 7th International Conference, 2010
2009
On the limits of the communication complexity technique for proving lower bounds on the size of minimal NFA's.
Theor. Comput. Sci., 2009
Reoptimization of Steiner trees: Changing the terminal set.
Theor. Comput. Sci., 2009
On the Size of Permutation Networks and Consequences for Efficient Simulation of Hypercube Algorithms on Bounded-Degree Networks.
SIAM J. Discrete Math., 2009
Lower Bounds on the Size of Sweeping Automata.
Journal of Automata, Languages and Combinatorics, 2009
Ambiguity and Communication.
Proceedings of the 26th International Symposium on Theoretical Aspects of Computer Science, 2009
Sieben Wunder der Informatik - Eine Reise an die Grenze des Machbaren mit Aufgaben und Lösungen (2. Aufl.).
Teubner, ISBN: 978-3-8351-0172-2, 2009
Algorithmic Adventures - From Knowledge to Magic.
Springer, ISBN: 978-3-540-85985-7, 2009
2008
On k-connectivity problems with sharpened triangle inequality.
J. Discrete Algorithms, 2008
Reoptimization of Steiner Trees.
Proceedings of the Algorithm Theory, 2008
On the Hardness of Reoptimization.
Proceedings of the SOFSEM 2008: Theory and Practice of Computer Science, 2008
Creating and Testing Textbooks for Secondary Schools.
Proceedings of the Informatics Education - Supporting Computational Thinking, Third International Conference on Informatics in Secondary Schools, 2008
On the Hardness of Determining Small NFA's and of Proving Lower Bounds on Their Sizes.
Proceedings of the Developments in Language Theory, 12th International Conference, 2008
Lehrbuch Informatik - Vorkurs Programmieren, Geschichte und Begriffsbildung, Automatenentwurf.
Vieweg, ISBN: 978-3-8348-0620-8, 2008
2007
Stability of Approximation.
Proceedings of the Handbook of Approximation Algorithms and Metaheuristics., 2007
Comparing the size of NFAs with and without epsilon-transitions.
Theor. Comput. Sci., 2007
The Parameterized Approximability of TSP with Deadlines.
Theory Comput. Syst., 2007
Job Shop Scheduling with Unit Length Tasks: Bounds and Algorithms.
Algorithmic Operations Research, 2007
On the Approximability of TSP on Local Modifications of Optimally Solved Instances.
Algorithmic Operations Research, 2007
Efficient Algorithms for the Spoonerism Problem.
Proceedings of the Fun with Algorithms, 4th International Conference, 2007
2006
On the Approximation Hardness of Some Generalizations of TSP.
Proceedings of the Algorithm Theory, 2006
Contributing to General Education by Teaching Informatics.
Proceedings of the Informatics Education - The Bridge between Using and Understanding Computers, International Conference in Informatics in Secondary Schools, 2006
Reusing Optimal TSP Solutions for Locally Modified Input Instances.
Proceedings of the Fourth IFIP International Conference on Theoretical Computer Science (TCS 2006), 2006
Sieben Wunder der Informatik - eine Reise an die Grenze des Machbaren mit Aufgaben und Lösungen.
Teubner, ISBN: 978-3-8351-0078-7, 2006
2005
Design and Analysis of Randomized Algorithms - Introduction to Design Paradigms
Texts in Theoretical Computer Science. An EATCS Series, Springer, ISBN: 978-3-540-27903-7, 2005
On the power of randomized multicounter machines.
Theor. Comput. Sci., 2005
On the Stability of Approximation for Hamiltonian Path Problems.
Proceedings of the SOFSEM 2005: Theory and Practice of Computer Science, 2005
NFAs With and Without epsilon-Transitions.
Proceedings of the Automata, Languages and Programming, 32nd International Colloquium, 2005
Communication Complexity Method for Proving Lower Bounds on Descriptional Complexity in Automata and Formal Language Theory.
Proceedings of the 7th International Workshop on Descriptional Complexity of Formal Systems - DCFS 2005, Como, Italy, June 30, 2005
Dissemination of Information in Communication Networks - Broadcasting, Gossiping, Leader Election, and Fault-Tolerance
Texts in Theoretical Computer Science. An EATCS Series, Springer, ISBN: 978-3-540-26663-1, 2005
2004
Algorithmics for Hard Problems - Introduction to Combinatorial Optimization, Randomization, Approximation, and Heuristics, Second Edition
Texts in Theoretical Computer Science. An EATCS Series, Springer, ISBN: 978-3-662-05269-3, 2004
On the power of nondeterminism and Las Vegas randomization for two-dimensional finite automata.
J. Comput. Syst. Sci., 2004
On multi-partition communication complexity.
Inf. Comput., 2004
Stability of Approximation in Discrete Optimization.
Proceedings of the Exploring New Frontiers of Theoretical Informatics, 2004
2003
The Power of Nondeterminism and Randomness for Oblivious Branching Programs.
Theory Comput. Syst., 2003
Nondeterminism versus Determinism for Two-Way Finite Automata: Generalizations of Sipser's Separation.
Proceedings of the Automata, Languages and Programming, 30th International Colloquium, 2003
Pushdown Automata and Multicounter Machines, a Comparison of Computation Modes.
Proceedings of the Automata, Languages and Programming, 30th International Colloquium, 2003
On k-Edge-Connectivity Problems with Sharpened Triangle Inequality.
Proceedings of the Algorithms and Complexity, 5th Italian Conference, 2003
2002
Descriptional Complexity of Finite Automata: Concepts and Open Problems.
Journal of Automata, Languages and Combinatorics, 2002
Communication Complexity Method for Measuring Nondeterminism in Finite Automata.
Inf. Comput., 2002
On the Hardness of Constructing Minimal 2-Connected Spanning Subgraphs in Complete Graphs with Sharpened Triangle Inequality.
Proceedings of the FST TCS 2002: Foundations of Software Technology and Theoretical Computer Science, 2002
2001
Algorithmics for Hard Problems - Introduction to Combinatorial Optimization, Randomization, Approximation, and Heuristics
Texts in Theoretical Computer Science. An EATCS Series, Springer, ISBN: 978-3-662-04616-6, 2001
On the power of Las Vegas II: Two-way finite automata.
Theor. Comput. Sci., 2001
Foreword.
Theor. Comput. Sci., 2001
Zufall und zufallsgesteuerte Algorithmen.
LOG IN, 2001
Translating Regular Expressions into Small -Free Nondeterministic Finite Automata.
J. Comput. Syst. Sci., 2001
On the Power of Las Vegas for One-Way Communication Complexity, OBDDs, and Finite Automata.
Inf. Comput., 2001
On Multipartition Communication Complexity
Electronic Colloquium on Computational Complexity (ECCC), 2001
Preface.
Discrete Applied Mathematics, 2001
On Multipartition Communication Complexity.
Proceedings of the STACS 2001, 2001
Randomized Communication Protocols (A Survey).
Proceedings of the Stochastic Algorithms: Foundations and Applications, 2001
Job Shop Scheduling with Unit Length Tasks: Bounds and Algorithms.
Proceedings of the Theoretical Computer Science, 7th Italian Conference, 2001
On the Power of Randomized Pushdown Automata.
Proceedings of the Developments in Language Theory, 5th International Conference, 2001
Descriptional Complexity of Regular Languages (Concepts and Open Problems).
Proceedings of the Third International Workshop on Descriptional Complexity of Automata, Grammars and Related Structures - DCAGRS 2001, Vienna, Austria, July 20, 2001
Algorithmischen Konzepte der Informatik - Berechenbarkeit, Komplexitätstheorie, Algorithmik, Kryptographie
Teubner, ISBN: 3-519-00332-5, 2001
Algorithmics for hard problems - introduction to combinatorial optimization, randomization, approximation, and heuristics.
Springer, ISBN: 978-3-540-66860-2, 2001
2000
Approximation algorithms for the TSP with sharpened triangle inequality.
Inf. Process. Lett., 2000
Measures of Nondeterminism in Finite Automata
Electronic Colloquium on Computational Complexity (ECCC), 2000
A Separation of Determinism, Las Vegas and Nondeterminism for Picture Recognition
Electronic Colloquium on Computational Complexity (ECCC), 2000
Tradeoffs between Nondeterminism and Complexity for Communication Protocols and Branching Programs.
Proceedings of the STACS 2000, 2000
An Improved Lower Bound on the Approximability of Metric TSP and Approximation Algorithms for the TSP with Sharpened Triangle Inequality.
Proceedings of the STACS 2000, 2000
Introduction: Workshop on Boolean Functions and Applications.
ICALP Satellite Workshops, 2000
Measures of Nondeterminism in Finite Automata.
Proceedings of the Automata, Languages and Programming, 27th International Colloquium, 2000
A Separation of Determinism, Las Vegas and Nondeterminism for Picture Recognition.
Proceedings of the 15th Annual IEEE Conference on Computational Complexity, 2000
Towards the Notion of Stability of Approximation for Hard Optimization Tasks and the Traveling Salesman Problem.
Proceedings of the Algorithms and Complexity, 4th Italian Conference, 2000
1999
Towards the Notion of Stability of Approximation for Hard Optimization Tasks and the Traveling Salesman Problem
Electronic Colloquium on Computational Complexity (ECCC), 1999
On the Power of Las Vegas II: Two-Way Finite Automata
Electronic Colloquium on Computational Complexity (ECCC), 1999
Some Constributions of the Study of Abstract Communication Complexity to Other Areas of Computer Science.
ACM Comput. Surv., 1999
Stability of Approximation Algorithms for Hard Optimization Problems.
Proceedings of the SOFSEM '99, Theory and Practice of Informatics, 26th Conference on Current Trends in Theory and Practice of Informatics, Milovy, Czech Republic, November 27, 1999
On the Power of Las Vegas II. Two-Way Finite Automata.
Proceedings of the Automata, 1999
Stability of Approximation Algorithms and the Knapsack Problem.
Proceedings of the Jewels are Forever, 1999
1998
Effective Systolic Algorithms for Gossiping in Cycles.
Parallel Processing Letters, 1998
Communication Complexity and Lower Bounds on Multilective Computations.
Proceedings of the Mathematical Foundations of Computer Science 1998, 1998
1997
Complexity: A Language-Theoretic Point of View.
Proceedings of the Handbook of Formal Languages, 1997
Optimal Algorithms for Broadcast and Gossip in the Edge-Disjoint Path Modes.
Inf. Comput., 1997
On the Power of Las Vegas for One-way Communication Complexity, Finite Automata, and Polynomial-time Computations
Electronic Colloquium on Computational Complexity (ECCC), 1997
Translating Regular Expressions into Small epsilon-Free Nondeterministic Finite Automata.
Proceedings of the STACS 97, 14th Annual Symposium on Theoretical Aspects of Computer Science, Lübeck, Germany, February 27, 1997
Las Vegas Versus Determinism for One-way Communication Complexity, Finite Automata, and Polynomial-time Computations.
Proceedings of the STACS 97, 14th Annual Symposium on Theoretical Aspects of Computer Science, Lübeck, Germany, February 27, 1997
Communication Complexity and Sequential Compuation.
Proceedings of the Mathematical Foundations of Computer Science 1997, 1997
Two Lower Bounds on Computational Complexity of Infinite Words.
Proceedings of the New Trends in Formal Languages, 1997
Communication Complexity and Parallel Computing.
Texts in Theoretical Computer Science. An EATCS Series, Springer, ISBN: 978-3-662-03442-2, 1997
1996
Dissemination of Information in Vertex-Disjoint Paths Mode.
Computers and Artificial Intelligence, 1996
Nondeterministic Communication with a Limited Number of Advice Bits.
Proceedings of the Twenty-Eighth Annual ACM Symposium on the Theory of Computing, 1996
1995
On Embeddings in Cycles
Inf. Comput., May, 1995
On the Sizes of Permutation Networks and Consequences for Efficient Simulation of Hypercube Algorithms on Bounded-Degree Networks.
STACS, 1995
Effective Systolic Algorithms for Gossiping in Cycles and Two-Dimensional Grids (Extended Abstract).
Proceedings of the Fundamentals of Computation Theory, 10th International Symposium, 1995
On the Communication Complexity of Distributive Language Generation.
Proceedings of the Developments in Language Theory II, 1995
1994
Note on Optimal Gossiping in Some Weak-Connected Graphs.
Theor. Comput. Sci., 1994
Optimal algorithms for dissemination of information in generalized communication modes.
Discrete Applied Mathematics, 1994
Optimal Algorithms for Broadcast and Gossip in the Edge-Disjoint Path Modes (Extended Abstract).
Proceedings of the Algorithm Theory, 1994
Two Lower Bounds on Distributive Generation of Languages.
Proceedings of the Mathematical Foundations of Computer Science 1994, 1994
A Comparison of Two Lower Bound Methods for Communication Complexity.
Proceedings of the Mathematical Foundations of Computer Science 1994, 1994
Two Lower Bounds on Computational Complexity of Infinite Word Generation.
Proceedings of the Technology and Foundations - Information Processing '94, Volume 1, Proceedings of the IFIP 13th World Computer Congress, Hamburg, Germany, 28 August, 1994
The Complexity of Systolic Dissemination of Information in Interconnection Networks.
Proceedings of the Parallel and Distributed Computing, 1994
Comparing Descriptional and Computational Complexity of Infinite Words.
Proceedings of the Results and Trends in Theoretical Computer Science, 1994
1993
A Note on Realtime One-Way Synchronized Alternating One-Counter Automata.
Theor. Comput. Sci., 1993
Optimal Algorithms for Dissemination of Information in Some Interconnection Networks.
Algorithmica, 1993
Gossiping in Vertex-Disjoint Path Mode in Interconnection Networks.
Proceedings of the Graph-Theoretic Concepts in Computer Science, 1993
Some Hierarchies for the Communication Complexity Measures of Cooperating Grammar Systems.
Proceedings of the Mathematical Foundations of Computer Science 1993, 1993
Gossiping in Vertex-Disjoint Paths Mode in d-Dimensional Grids and Planar Graphs.
Proceedings of the Algorithms - ESA '93, First Annual European Symposium, Bad Honnef, Germany, September 30, 1993
Deterministic Versus Nondeterministic Space in Terms of Synchronized Alternating Machines.
Proceedings of the Developments in Language Theory, 1993
1992
Branching Programs Provide Lower Bounds on the Areas of Multilective Deterministic and Nondeterministic VLSI-Circuits
Inf. Comput., February, 1992
Lower Bounds on the Area Complexity of Boolean Circuits.
Theor. Comput. Sci., 1992
Abstract symbol systems - an exercise of the bottom-up approach in artificial intelligence.
J. Exp. Theor. Artif. Intell., 1992
On the Power of One-Way Synchronized Alternating Machines with Small Space.
Int. J. Found. Comput. Sci., 1992
Topology of Parallel Networks and Computational Complexity (Extended Abstract).
Proceedings of the Graph-Theoretic Concepts in Computer Science, 1992
A Nonlinear Lower Bound on the Practical Combinational Complexity.
Proceedings of the STACS 92, 1992
On Embedding Interconnection Networks into Rings of Processors.
Proceedings of the PARLE '92: Parallel Architectures and Languages Europe, 1992
Optimal Algorithms for Disemination of Information in Generalized Communication Modes.
Proceedings of the PARLE '92: Parallel Architectures and Languages Europe, 1992
1991
Nonlinear Lower Bounds on the Number of Processors of Circuits with Sublinear Separators
Inf. Comput., December, 1991
On Problems for Which no Oracle Can Help.
Mathematical Systems Theory, 1991
Branching programs provide lower bounds on the area of VLSI circuits.
Kybernetika, 1991
On the power of two-dimensional synchronized alternating finite automata.
Fundam. Inform., 1991
Variable Multihead Machines.
Elektronische Informationsverarbeitung und Kybernetik, 1991
On the power of synchronization in parallel computations.
Discrete Applied Mathematics, 1991
The Bisection Problem for Graphs of Degree 4 (Configuring Transputer Systems).
Proceedings of the Mathematical Foundations of Computer Science 1991, 1991
Nonlinear Lower Bounds on the Number of Processors of Circuits with Sublinear Separators (Extended Abstract).
Proceedings of the Fundamentals of Computation Theory, 8th International Symposium, 1991
1990
Optimal Algorithms for Dissemination of Information in Some Interconnection Networks (Extended Abstract).
Proceedings of the Mathematical Foundations of Computer Science 1990, 1990
1989
A Leaf-Size Hierarchy of Two-Dimensional Alternating Turing Machines.
Theor. Comput. Sci., 1989
Tradeoffs for Language Recognition on Alternating Machines.
Theor. Comput. Sci., 1989
Lower Bounds for Language Recognition on Two-Dimensional Alternating Multihead Machines.
J. Comput. Syst. Sci., 1989
The knowledge on information content of problems provides much useful information to circuit designers.
Bulletin of the EATCS, 1989
On the Power of Synchronization in Parallel Computations.
Proceedings of the Mathematical Foundations of Computer Science 1989, 1989
1988
The Advantages of a New Approach to Defining the Communication Complexity for VLSI.
Theor. Comput. Sci., 1988
Graph Controlled Table Lindenmayer Systems.
Elektronische Informationsverarbeitung und Kybernetik, 1988
A candidate for nonlinear lower bound on the combinatorial complexity.
Bulletin of the EATCS, 1988
Branching Programs as a Tool for Proving Lower Bounds on VLSI Computations and Optimal Algorithms for Systolic Arrays.
Proceedings of the Mathematical Foundations of Computer Science 1988, 1988
1987
Reversal-Bounded Nondeterministic Multicounter Machines and Complementation.
Theor. Comput. Sci., 1987
Zerotesting bounded one-way multicounter machines.
Kybernetika, 1987
Reversal Complexity of Multicounter and Multihead Machines.
Proceedings of the STACS 87, 1987
1986
Communication Complexity Hierarchy.
Theor. Comput. Sci., 1986
Hierarchy of reversal bounded one-way multicounter machines.
Kybernetika, 1986
A New Approach to Defining the Complexity for VLSI.
Proceedings of the Mathematical Foundations of Computer Science 1986, 1986
Lower bound techniques for VLSI algorithms.
Proceedings of the Trends, 1986
Tradeoffs for Language Recognition on Parallel Computing Models.
Proceedings of the Automata, Languages and Programming, 13th International Colloquium, 1986
1985
On the number of monotonic functions from two-valued logic to k-valued logic.
Kybernetika, 1985
On the Power of Alternation in Automata Theory.
J. Comput. Syst. Sci., 1985
Linear Lower Bounds on Unbounded Fan-In Boolean Circuits.
Inf. Process. Lett., 1985
Alternating Multicounter Machines with Constant Number of Reversals.
Inf. Process. Lett., 1985
Fooling a Two-Way Nondeterministic Multihead Automaton with Reversal Number Restriction.
Acta Inf., 1985
1984
A note on the "Comuunication Complexity" paper by Papadimitriou and Sipser.
Bulletin of the EATCS, 1984
On the power of Yao-Rivest technique.
Bulletin of the EATCS, 1984
On the Power of Alternation in Finite Automata.
Proceedings of the Mathematical Foundations of Computer Science 1984, 1984
Hierarchy of Reversal and Zerotesting Bounded Multicounter Machines.
Proceedings of the Mathematical Foundations of Computer Science 1984, 1984
Communication Complexity.
Proceedings of the Automata, 1984
1983
One-Way Simple Multihead Finite Automata are not Closed Under Concatenation.
Theor. Comput. Sci., 1983
On-Way Multihead Deterministic Finite Automata.
Acta Inf., 1983
1982
Multihead Finite State Automata and Concatenation.
Proceedings of the Automata, 1982
1981
Closure Properties of the Family of Languages Recognized by One-Way Two-Head Deterministic Finite State Automata.
Proceedings of the Mathematical Foundations of Computer Science 1981, Strbske Pleso, Czechoslovakia, August 31, 1981