%% -*-BibTeX-*- @TechReport{BorndoerferNeumannPfetsch2005b, author = "Ralf Bornd{\"o}rfer and Marika Neumann and Marc E. Pfetsch", title = "Optimal Fares for Public Transport", number = "ZIB Report 05-35", institution = "Zuse-Institut Berlin", address = "Takustr. 7, 14195 Berlin", year = "2005", URL = "http://www.zib.de/PaperWeb/abstracts/ZR-05-35", language = "English", }