@techreport{BorndoerferHoppmannKarbstein2015, author = {Ralf Bornd{\"o}rfer and Heide Hoppmann and Marika Karbstein}, title = {Passenger Routing for Periodic Timetable Optimization}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {15-55}, language = {eng}, year = {2015} }