@techreport{BorndoerferKarbsteinLiebchenetal.2018, author = {Ralf Bornd{\"o}rfer and Marika Karbstein and Christian Liebchen and Niels Lindner}, title = {A Simple Way to Compute the Number of Vehicles That Are Required to Operate a Periodic Timetable}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {18-38}, language = {eng}, year = {2018} }