@techreport{GroetschelHauptmeierKrumkeetal.1999, author = {Martin Gr{\"o}tschel and Dietrich Hauptmeier and Sven Krumke and J{\"o}rg Rambau}, title = {Simulation Studies for the Online-Dial-a-Ride Problem}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {SC-99-09}, language = {eng}, year = {1999} }