%% -*-BibTeX-*- @TechReport{BorndoerferSagnolSwarat2011, author = "Ralf Bornd{\"o}rfer and Guillaume Sagnol and Elmar Swarat", title = "An {IP} Approach to Toll Enforcement Optimization on German Motorways", type = "{ZIB} Report", number = "11-42", institution = "ZIB", address = "Takustr.7, 14195 Berlin", year = "2011", note = "accepted 21.10.2011 for publicaton in Operations Research Proceedings 2011", URL = "http://vs24.kobv.de/opus4-zib/frontdoor/index/index/docId/1429", language = "English", }