On the Complexity of Train Assignment Problems. - Thomas Erlebach; Martin Gantenbein; Daniel Hürlimann; Gabriele Neyer; Aris Pagourtzis; Paolo Penna; Konrad Schlude; Kathleen Steinhöfel; David Scot Taylor; Peter Widmayer (ISAAC, 2001)

Train Routing Algorithms: Concepts, Design Choises, and Practical Considerations. - Luzi Anderegg; Stephan J. Eidenbenz; Martin Gantenbein; Christoph Stamm; David Scot Taylor; Birgitta Weber; Peter Widmayer (ALENEX, 2003)