A Symmetric D2L Model for String Regeneration. - Keijo Ruohonen (Automata, Languages, Development, 1975)

Three Results of Comparison Between L Languages with and without Interaction. - Keijo Ruohonen (Inf. Process. Lett., 1975)

Developmental Systems with Interaction and Fragmentation - Keijo Ruohonen (Inf. Control., 1975)

Zeros of Z -Rational Functions and D0L Equivalence. - Keijo Ruohonen (Theor. Comput. Sci., 1976)

On Circular Words and (omega* + omega)-Powers of Words. - Keijo Ruohonen (J. Inf. Process. Cybern., 1977)

A Note on Equal Powers of Word Morphisms. - Keijo Ruohonen (RAIRO Theor. Informatics Appl., 1977)

Remarks on Locally Catenative Developmental Sequences. - Keijo Ruohonen (J. Inf. Process. Cybern., 1978)

A Note on Language Equations Involving Morphisms. - Keijo Ruohonen (Inf. Process. Lett., 1978)

Isomorphism, Form Equivalence and Sequence Equivalence of PD0L Forms. - Karel Culík II; Hermann A. Maurer; Thomas Ottmann; Keijo Ruohonen; Arto Salomaa (Theor. Comput. Sci., 1978)

The Inclusion Problem for DOI Languages. - Keijo Ruohonen (J. Inf. Process. Cybern., 1979)

The Decidability of the F0L-D0L Equivalence Problem. - Keijo Ruohonen (Inf. Process. Lett., 1979)

On Some Decidability Problems for HD0L Systems with Nonsingular Parikh Matrices. - Keijo Ruohonen (Theor. Comput. Sci., 1979)

On the Decidability of the OL-DOL Equivalence Problem - Keijo Ruohonen (Inf. Control., 1979)

On a variant of a method of Berstel's and Nielsen's. - Keijo Ruohonen (Fundam. Informaticae, 1981)

A Morphic Representation of Complements of Recursively Enumerable Sets. - Andrzej Ehrenfeucht; Grzegorz Rozenberg; Keijo Ruohonen (J. ACM, 1981)

The Decidability of the D0L-DT0L Equivalence Problem. - Keijo Ruohonen (J. Comput. Syst. Sci., 1981)

On Some Variants of Post's Correspondence Problem. - Keijo Ruohonen (Acta Informatica, 1983)

A note on off-line machines with 'brownian' input heads. - Keijo Ruohonen (Discret. Appl. Math., 1984)

A morphic representation of EOL languages and other ETOL languages. - Andrzej Ehrenfeucht; Grzegorz Rozenberg; Keijo Ruohonen (Discret. Appl. Math., 1985)

Reversible Machines and Post's Correspondence Problem for Biprefix Morphisms. - Keijo Ruohonen (J. Inf. Process. Cybern., 1985)

On Equality of Multiplicity Sets of Regular Languages. - Keijo Ruohonen (Theor. Comput. Sci., 1985)

Undecidability of Event Detection for ODEs. - Keijo Ruohonen (J. Inf. Process. Cybern., 1993)

Event Detection for ODEs and Nonrecursive Hierarchies. - Keijo Ruohonen (Results and Trends in Theoretical Computer Science, 1994)

An Effective Cauchy-Peano Existence Theorem for Unique Solutions. - Keijo Ruohonen (Int. J. Found. Comput. Sci., 1996)

Decidability and complexity of event detection problems for ODEs. - Keijo Ruohonen (Complex., 1997)

Undecidable Event Detection Problems for Odes of Dimension One and Two. - Keijo Ruohonen (RAIRO Theor. Informatics Appl., 1997)

Solving Equivalence of Recurrent Sequences in Groups by Polynomial Manipulation. - Keijo Ruohonen (Fundam. Informaticae, 1999)

Visual tests for measuring the picture quality of teleconsultations for medical purposes. - Heikki Lamminen; Keijo Ruohonen; Hannu Uusitalo (Comput. Methods Programs Biomed., 2001)

A three-year follow-up of Finnish telemedicine programs. - Hannu Lamminen; V. Sernberg; Keijo Ruohonen; R. Roine (IEEE Trans. Inf. Technol. Biomed., 2001)

On the Images of N-Rational Sequences Counting Multiplicities. - Juha Honkala; Keijo Ruohonen (Int. J. Algebra Comput., 2003)

Chomskian Hierarchies of Families of Sets of Piecewise Continuous Functions. - Keijo Ruohonen (Theory Comput. Syst., 2004)

Explicit test sets for iterated morphisms in free monoids and metabelian groups. - Keijo Ruohonen (Theor. Comput. Sci., 2005)

Developing Itô stochastic differential equation models for neuronal signal transduction pathways. - Tiina Manninen; Marja-Leena Linne; Keijo Ruohonen (Comput. Biol. Chem., 2006)

A novel approach to model neuronal signal transduction using stochastic differential equations. - Tiina Manninen; Marja-Leena Linne; Keijo Ruohonen (Neurocomputing, 2006)

D0L sequence equivalence is in P for fixed alphabets. - Keijo Ruohonen (RAIRO Theor. Informatics Appl., 2008)

Equivalence of Set- and Bag-Valued Orbits. - Keijo Ruohonen (J. Autom. Lang. Comb., 2009)

An Analysis of Relevance Vector Machine Regression. - Matti Saarela; Tapio Elomaa; Keijo Ruohonen (Advances in Machine Learning I, 2010)

Computational study of noise in a large signal transduction network. - Jukka Intosalmi; Tiina Manninen; Keijo Ruohonen; Marja-Leena Linne (BMC Bioinform., 2011)

Information Diversity in Structure and Dynamics of Simulated Neuronal Networks. - Tuomo Mäki-Marttunen; Jugoslava Acimovic; Matti Nykter; Juha Kesseli; Keijo Ruohonen; Olli Yli-Harja; Marja-Leena Linne (Frontiers Comput. Neurosci., 2011)