@incollection{BorndoerferNeumannPfetsch2006, author = {Ralf Bornd{\"o}rfer and Marika Neumann and Marc Pfetsch}, title = {Optimal Fares for Public Transport}, booktitle = {Operations Research Proceedings 2005}, editor = {Hans-Dietrich Haasis and Herbert Kopfer and J{\"o}rn Sch{\"o}nberger}, pages = {29 -- 36}, url = {{http://opus.kobv.de/zib/volltexte/2005/869/}}, year = {2006}, }