@techreport{BorndoerferSagnolSwarat2011, author = {Ralf Bornd{\"o}rfer and Guillaume Sagnol and Elmar Swarat}, title = {An IP Approach to Toll Enforcement Optimization on German Motorways}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {11-42}, language = {eng}, year = {2011} }