Frank Fischer, Christoph Helmberg, Jürgen Janßen, Boris Krostitz. Towards Solving Very Large Scale Train Timetabling Problems by Lagrangian Relaxation. In Matteo Fischetti, Peter Widmayer, editors, ATMOS 2008 - 8th Workshop on Algorithmic Approaches for Transportation Modeling, Optimization, and Systems, Karlsruhe, Germany, September 18, 2008. Volume 08002 of Dagstuhl Seminar Proceedings, Internationales Begegnungs- und Forschungszentrum fuer Informatik (IBFI), Schloss Dagstuhl, Germany, 2008. [doi]