Michael Zilske; Andreas Neumann; Kai Nagel (2 September 2015). "OpenStreetMap for traffic simulation". Proceedings of the 1st European state of the map : OpenStreetMap conference. Technische Universitat Berlin Collection. doi:10.14279/depositonce-4679. Retrieved 22 May 2016.
Michael Zilske; Andreas Neumann; Kai Nagel (2 September 2015). "OpenStreetMap for traffic simulation". Proceedings of the 1st European state of the map : OpenStreetMap conference. Technische Universitat Berlin Collection. doi:10.14279/depositonce-4679. Retrieved 22 May 2016.