@misc{BorndoerferLoebel2000, author = {Ralf Bornd{\"o}rfer and Andreas L{\"o}bel}, title = {Dienstplanoptimierung im {\"O}PNV}, url = {http://www.uni-duisburg.de/FB11/PUBL/PRPLIST/prp00.html}, institution = {Mathematical Optimization}, year = {2000}, }