@techreport{BorndoerferLoebelWeider2004, author = {Ralf Bornd{\"o}rfer and Andreas L{\"o}bel and Steffen Weider}, title = {A Bundle Method for Integrated Multi-Depot Vehicle and Duty Scheduling in Public Transit}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {04-14}, language = {eng}, year = {2004} }