Frequency assignment in cellular phone networks. - Ralf Borndörfer; Andreas Eisenblätter; Martin Grötschel; Alexander Martin 001 (Ann. Oper. Res., 1998)

Decomposing Matrices into Blocks. - Ralf Borndörfer; Carlos E. Ferreira; Alexander Martin 001 (SIAM J. Optim., 1998)

Set packing relaxations of some integer programs. - Ralf Borndörfer; Robert Weismantel (Math. Program., 2000)

Discrete relaxations of combinatorial programs. - Ralf Borndörfer; Robert Weismantel (Discret. Appl. Math., 2001)

Combinatorial Packing Problems. - Ralf Borndörfer (The Sharpest Cut, 2004)

Optimal Fares for Public Transport. - Ralf Borndörfer; Marika Neumann; Marc E. Pfetsch (OR, 2005)

A Column Generation Approach to Airline Crew Scheduling. - Ralf Borndörfer; Uwe Schelten; Thomas Schlechte; Steffen Weider (OR, 2005)

Routing in Line Planning for Public Transport. - Marc E. Pfetsch; Ralf Borndörfer (OR, 2005)

Models for Railway Track Allocation. - Ralf Borndörfer; Thomas Schlechte (ATMOS, 2007)

When Periodic Timetables Are Suboptimal. - Ralf Borndörfer; Christian Liebchen (OR, 2007)

Solving Railway Track Allocation Problems. - Ralf Borndörfer; Thomas Schlechte (OR, 2007)

A Column-Generation Approach to Line Planning in Public Transport. - Ralf Borndörfer; Martin Grötschel; Marc E. Pfetsch (Transp. Sci., 2007)

Line Planning on Paths and Tree Networks with Applications to the Quito Trolebús System. - Luis Miguel Torres; Ramiro Torres; Ralf Borndörfer; Marc E. Pfetsch (ATMOS, 2008)

Balancing Efficiency and Robustness - A Bi-criteria Optimization Approach to Railway Track Allocation. - Thomas Schlechte; Ralf Borndörfer (MCDM, 2008)

Line Planning and Connectivity. - Ralf Borndörfer; Marika Neumann; Marc E. Pfetsch (Models and Algorithms for Optimization in Logistics, 2009)

A Binary Quadratic Programming Approach to the Vehicle Positioning Problem. - Ralf Borndörfer; Carlos Cardonha (HPSC, 2009)

Determining Fair Ticket Prices in Public Transport by Solving a Cost Allocation Problem. - Ralf Borndörfer; Nam-Dung Hoang (HPSC, 2009)

Railway Track Allocation by Rapid Branching. - Ralf Borndörfer; Thomas Schlechte; Steffen Weider (ATMOS, 2010)

A Hypergraph Model for Railway Vehicle Rotation Planning. - Ralf Borndörfer; Markus Reuther; Thomas Schlechte; Steffen Weider (ATMOS, 2011)

An IP approach to toll enforcement optimization on German motorways. - Ralf Borndörfer; Guillaume Sagnol; Elmar Swarat (OR, 2011)

Minimum Cost Hyperassignments with Applications to ICE/IC Rotation Planning. - Olga Heismann; Ralf Borndörfer (OR, 2011)

Line planning on tree networks with applications to the Quito Trolebús system. - Luis Miguel Torres; Ramiro Torres; Ralf Borndörfer; Marc E. Pfetsch (Int. Trans. Oper. Res., 2011)

Micro-macro transformation of railway networks. - Thomas Schlechte; Ralf Borndörfer; Berkan Erol; Thomas Graffagnino; Elmar Swarat (J. Rail Transp. Plan. Manag., 2011)

A Direct Connection Approach to Integrated Line Planning and Passenger Routing. - Ralf Borndörfer; Marika Karbstein (ATMOS, 2012)

A Stackelberg Game to Optimize the Distribution of Controls in Transportation Networks. - Ralf Borndörfer; Bertrand Omont; Guillaume Sagnol; Elmar Swarat (GAMENETS, 2012)

A Case Study on Optimizing Toll Enforcements on Motorways. - Ralf Borndörfer; Guillaume Sagnol; Elmar Swarat (SCOR, 2012)

Models for fare planning in public transport. - Ralf Borndörfer; Marika Karbstein; Marc E. Pfetsch (Discret. Appl. Math., 2012)

A set partitioning approach to shunting. - Carlos Cardonha; Ralf Borndörfer (Discret. Appl. Math., 2012)

A Configuration Model for the Line Planning Problem. - Ralf Borndörfer; Heide Hoppmann; Marika Karbstein (ATMOS, 2013)

Re-Optimization of Rolling Stock Rotations. - Ralf Borndörfer; Julika Mehrgardt; Markus Reuther; Thomas Schlechte; Kerstin Waas (OR, 2013)

A Generalization of Odd Set Inequalities for the Set Packing Problem. - Olga Heismann; Ralf Borndörfer (OR, 2013)

Optimizing Toll Enforcement in Transportation Networks: a Game-Theoretic Approach. - Ralf Borndörfer; Julia Buwaya; Guillaume Sagnol; Elmar Swarat (Electron. Notes Discret. Math., 2013)

The Steiner connectivity problem. - Ralf Borndörfer; Marika Karbstein; Marc E. Pfetsch (Math. Program., 2013)

Duty scheduling templates. - Ralf Borndörfer; Andreas Langenhan; Andreas Löbel; Christof Schulz; Steffen Weider (Public Transp., 2013)

Rapid branching. - Ralf Borndörfer; Andreas Löbel; Markus Reuther; Thomas Schlechte; Steffen Weider (Public Transp., 2013)

A Coarse-To-Fine Approach to the Railway Rolling Stock Rotation Problem. - Ralf Borndörfer; Markus Reuther; Thomas Schlechte (ATMOS, 2014)

An Approximation Result for Matchings in Partitioned Hypergraphs. - Isabel Beckenbach; Ralf Borndörfer (OR, 2014)

The Cycle Embedding Problem. - Ralf Borndörfer; Marika Karbstein; Julika Mehrgardt; Markus Reuther; Thomas Schlechte (OR, 2014)

Optimizing the Simplon railway corridor. - Ralf Borndörfer; Berkan Erol; Thomas Graffagnino; Thomas Schlechte; Elmar Swarat (Ann. Oper. Res., 2014)

Regional Search for the Resource Constrained Assignment Problem. - Ralf Borndörfer; Markus Reuther (ATMOS, 2015)

Fair ticket pricing in public transport as a constrained cost allocation game. - Ralf Borndörfer; Nam-Dung Hoang (Ann. Oper. Res., 2015)

The hypergraph assignment problem. - Ralf Borndörfer; Olga Heismann (Discret. Optim., 2015)

Metric inequalities for routings on direct connections with application to line planning. - Ralf Borndörfer; Marika Karbstein (Discret. Optim., 2015)

On the Path Avoiding Forbidden Pairs Polytope. - Marco Blanco; Ralf Borndörfer; Michael Brückner; Nam-Dung Hoang; Thomas Schlechte (Electron. Notes Discret. Math., 2015)

The Random Hypergraph Assignment Problem. - Ralf Borndörfer; Olga Heismann (Informatica (Slovenia), 2015)

Network spot-checking games: Theory and application to toll enforcing in transportation networks. - Ralf Borndörfer; Julia Buwaya; Guillaume Sagnol; Elmar Swarat (Networks, 2015)

Solving Time Dependent Shortest Path Problems on Airway Networks Using Super-Optimal Wind. - Marco Blanco; Ralf Borndörfer; Nam-Dung Hoang; Anton Kaier; Adam Schienle; Thomas Schlechte; Swen Schlobach (ATMOS, 2016)

Separation of Cycle Inequalities for the Periodic Timetabling Problem. - Ralf Borndörfer; Heide Hoppmann; Marika Karbstein (ESA, 2016)

PolySCIP. - Ralf Borndörfer; Sebastian Schenker; Martin Skutella; Timo Strunk (ICMS, 2016)

Line Planning on Path Networks with Application to the Istanbul Metrobüs. - Ralf Borndörfer; Oytun Arslan; Ziena Elijazyfer; Hakan Güler; Malte Renken; Güvenç Sahin; Thomas Schlechte (OR, 2016)

The Modulo Network Simplex with Integrated Passenger Routing. - Ralf Borndörfer; Heide Hoppmann; Marika Karbstein; Fabian Löbel (OR, 2016)

An Extended Network Interdiction Problem for Optimal Toll Control. - Ralf Borndörfer; Guillaume Sagnol; Stephan Schwartz (Electron. Notes Discret. Math., 2016)

The Freight Train Routing Problem for Congested Railway Networks with Mixed Traffic. - Ralf Borndörfer; Torsten Klug; Thomas Schlechte; Armin Fügenschuh; Thilo Schang; Hanno Schülldorf (Transp. Sci., 2016)

Integrated Optimization of Rolling Stock Rotations for Intercity Railways. - Ralf Borndörfer; Markus Reuther; Thomas Schlechte; Kerstin Waas; Steffen Weider (Transp. Sci., 2016)

Cost Projection Methods for the Shortest Path Problem with Crossing Costs. - Marco Blanco; Ralf Borndörfer; Nam-Dung Hoang; Anton Kaier; Pedro M. Casas; Thomas Schlechte; Swen Schlobach (ATMOS, 2017)

Timetable Sparsification by Rolling Stock Rotation Optimization. - Ralf Borndörfer; Matthias Breuer; Boris Grimm; Markus Reuther; Stanley Schade; Thomas Schlechte (OR, 2017)

Demand-Driven Line Planning with Selfish Routing. - Malte Renken; Amin Ahmadi; Ralf Borndörfer; Güvenç Sahin; Thomas Schlechte (OR, 2017)

On Finding Subpaths With High Demand. - Stephan Schwartz; Leonardo Balestrieri; Ralf Borndörfer (OR, 2017)

Optimal duty rostering for toll enforcement inspectors. - Ralf Borndörfer; Guillaume Sagnol; Thomas Schlechte; Elmar Swarat (Ann. Oper. Res., 2017)

Template-based re-optimization of rolling stock rotations. - Ralf Borndörfer; Boris Grimm; Markus Reuther; Thomas Schlechte (Public Transp., 2017)

Passenger routing for periodic timetable optimization. - Ralf Borndörfer; Heide Hoppmann; Marika Karbstein (Public Transp., 2017)

Integration of duty scheduling and rostering to increase driver satisfaction. - Ralf Borndörfer; Christof Schulz; Stephan Seidl; Steffen Weider (Public Transp., 2017)

A Simple Way to Compute the Number of Vehicles That Are Required to Operate a Periodic Timetable. - Ralf Borndörfer; Marika Karbstein; Christian Liebchen; Niels Lindner (ATMOS, 2018)

Correction to: Fair ticket pricing in public transport as a constrained cost allocation game. - Ralf Borndörfer; Nam-Dung Hoang (Ann. Oper. Res., 2018)

Hall's and Kőnig's theorem in graphs and hypergraphs. - Isabel Beckenbach; Ralf Borndörfer (Discret. Math., 2018)

The Graph Segmentation Problem. - Stephan Schwartz; Ralf Borndörfer; Gerald Bartz (Electron. Notes Discret. Math., 2018)

Robust allocation of operating rooms: A cutting plane approach to handle lognormal case durations. - Guillaume Sagnol; Christoph Barner; Ralf Borndörfer; Mickaël Grima; Matthes Seeling; Claudia Spies; Klaus Wernecke (Eur. J. Oper. Res., 2018)

An approximation algorithm for the Steiner connectivity problem. - Ralf Borndörfer; Marika Karbstein (Networks, 2018)

A Graph- and Monoid-Based Framework for Price-Sensitive Routing in Local Public Transportation Networks. - Ricardo Euler; Ralf Borndörfer (ATMOS, 2019)

A Cut Separation Approach for the Rolling Stock Rotation Problem with Vehicle Maintenance. - Boris Grimm; Ralf Borndörfer; Markus Reuther; Thomas Schlechte (ATMOS, 2019)

A Solution Approach to the Vehicle Routing Problem with Perishable Goods. - Boris Grimm; Ralf Borndörfer; Mats Olthoff (OR, 2019)

The Restricted Modulo Network Simplex Method for Integrated Periodic Timetabling and Passenger Routing. - Fabian Löbel; Niels Lindner; Ralf Borndörfer (OR, 2019)

Optimization of handouts for rolling stock rotations. - Ralf Borndörfer; Boris Grimm; Markus Reuther; Thomas Schlechte (J. Rail Transp. Plan. Manag., 2019)

Separation of cycle inequalities in periodic timetabling. - Ralf Borndörfer; Heide Hoppmann; Marika Karbstein; Niels Lindner (Discret. Optim., 2020)

A concurrent approach to the periodic event scheduling problem. - Ralf Borndörfer; Niels Lindner; Sarah Roth (J. Rail Transp. Plan. Manag., 2020)

Connected k-Partition of k-Connected Graphs and c-Claw-Free Graphs. - Ralf Borndörfer; Katrin Casel; Davis Issac; Aikaterini Niklanovits; Stephan Schwartz; Ziena Zeif (APPROX-RANDOM, 2021)

Efficient Algorithms for the Multi-Period Line Planning Problem in Public Transportation (Short Paper). - Güvenç Sahin; Amin Ahmadi Digehsara; Ralf Borndörfer (ATMOS, 2021)

ULD Build-Up Scheduling with Dynamic Batching in an Air Freight Hub. - Ricardo Euler; Ralf Borndörfer; Timo Strunk; Tuomo Takkula (OR, 2021)

Optimal Line Plans in the Parametric City and the Impact of In-Motion Costs. - Berenike Masing; Niels Lindner; Ralf Borndörfer (OR, 2021)

Finding Minimum Balanced Separators - An Exact Approach. - William Surau; Ralf Borndörfer; Stephan Schwartz (OR, 2021)

A Discrete-Continuous Algorithm for Free Flight Planning. - Ralf Borndörfer; Fabian Danecker; Martin Weiser (Algorithms, 2021)

An FPTAS for Dynamic Multiobjective Shortest Path Problems. - Pedro Maristany de las Casas; Ralf Borndörfer; Luitgard Kraus; Antonio Sedeño-Noda (Algorithms, 2021)

An Improved Multiobjective Shortest Path Algorithm. - Pedro Maristany de las Casas; Antonio Sedeño-Noda; Ralf Borndörfer (Comput. Oper. Res., 2021)

Multiobjective Dijkstra A. - Pedro Maristany de las Casas; Luitgard Kraus; Antonio Sedeño-Noda; Ralf Borndörfer (CoRR, 2021)

Deutsche Bahn Schedules Train Rotations Using Hypergraph Optimization. - Ralf Borndörfer; Thomas Eßer; Patrick Frankenberger; Andreas Huck; Christoph Jobmann; Boris Krostitz; Karsten Kuchenbecker; Kai Mohrhagen; Philipp Nagl; Michael Peterson; Markus Reuther; Thilo Schang; et al. (INFORMS J. Appl. Anal., 2021)

An A* Algorithm for Flight Planning Based on Idealized Vertical Profiles. - Marco Blanco; Ralf Borndörfer; Pedro Maristany de las Casas (ATMOS, 2022)

A Discrete-Continuous Algorithm for Globally Optimal Free Flight Trajectory Optimization. - Ralf Borndörfer; Fabian Danecker; Martin Weiser (ATMOS, 2022)

Rooted Maximum Weight Connected Subgraphs with Balancing and Capacity Constraints. - Ralf Borndörfer; Stephan Schwartz; William Surau (INOC, 2022)

Price Optimal Routing in Public Transportation. - Ricardo Euler; Ralf Borndörfer (CoRR, 2022)

Error Bounds for Discrete-Continuous Shortest Path Problems with Application to Free Flight Trajectory Optimization. - Ralf Borndörfer; Fabian Danecker; Martin Weiser (CoRR, 2022)

Timetable optimization for a moving block system. - Thomas Schlechte; Ralf Borndörfer; Jonas Denißen; Simon Heller; Torsten Klug; Michael Küpper; Niels Lindner; Markus Reuther; Andreas Söhlke; William Steadman (J. Rail Transp. Plan. Manag., 2022)

Convergence Properties of Newton's Method for Globally Optimal Free Flight Trajectory Optimization (Short Paper). - Ralf Borndörfer; Fabian Danecker; Martin Weiser (ATMOS, 2023)

Assignment Based Resource Constrained Path Generation for Railway Rolling Stock Optimization. - Boris Grimm; Ralf Borndörfer; Julian Bushe (ATMOS, 2023)

Non-Linear Charge Functions for Electric Vehicle Scheduling with Dynamic Recharge Rates (Short Paper). - Fabian Löbel; Ralf Borndörfer; Steffen Weider (ATMOS, 2023)

Convergence Properties of Newton's Method for Globally Optimal Free Flight Trajectory Optimization. - Ralf Borndörfer; Fabian Danecker; Martin Weiser (CoRR, 2023)

Vertex covering with capacitated trees. - Ralf Borndörfer; Stephan Schwartz; William Surau (Networks, 2023)

A three-phase heuristic for the Fairness-Oriented Crew Rostering Problem. - Thomas Breugem; Thomas Schlechte; Christof Schulz; Ralf Borndörfer (Comput. Oper. Res., 2023)

Error Bounds for Discrete-Continuous Free Flight Trajectory Optimization. - Ralf Borndörfer; Fabian Danecker; Martin Weiser (J. Optim. Theory Appl., 2023)

Newton's Method for Global Free Flight Trajectory Optimization. - Ralf Borndörfer; Fabian Danecker; Martin Weiser (Oper. Res. Forum, 2023)

Targeted multiobjective Dijkstra algorithm. - Pedro Maristany de las Casas; Luitgard Kraus; Antonio Sedeño-Noda; Ralf Borndörfer (Networks, 2023)

Solving the Electric Bus Scheduling Problem by an Integrated Flow and Set Partitioning Approach. - Ralf Borndörfer; Andreas Löbel; Fabian Löbel; Steffen Weider (ATMOS, 2024)

A Bayesian Rolling Horizon Approach for Rolling Stock Rotation Planning with Predictive Maintenance. - Felix Prause; Ralf Borndörfer (ATMOS, 2024)

ULD Build-Up Scheduling with Logic-Based Benders Decomposition. - Ricardo Euler; Ralf Borndörfer; Christian Puchert; Tuomo Takkula (CPAIOR (1), 2024)

Logic-Constrained Shortest Paths for Flight Planning. - Ricardo Euler; Pedro Maristany de las Casas; Ralf Borndörfer (CoRR, 2024)

Price optimal routing in public transportation. - Ricardo Euler; Niels Lindner; Ralf Borndörfer (EURO J. Transp. Logist., 2024)

Approximating rolling stock rotations with integrated predictive maintenance. - Felix Prause; Ralf Borndörfer; Boris Grimm; Alexander Tesch (J. Rail Transp. Plan. Manag., 2024)

New Dynamic Programming algorithm for the Multiobjective Minimum Spanning Tree problem. - Pedro Maristany de las Casas; Antonio Sedeño-Noda; Ralf Borndörfer (Comput. Oper. Res., 2025)

K-shortest simple paths using biobjective path search. - Pedro Maristany de las Casas; Antonio Sedeño-Noda; Ralf Borndörfer; Max Huneshagen (Math. Program. Comput., 2025)