Bernd Krieg-Brückner, Hui Shi. Orientation Calculi and Route Graphs: Towards Semantic Representations for Route Descriptions. In Martin Raubal, Harvey J. Miller, Andrew U. Frank, Michael F. Goodchild, editors, Geographic Information Science, 4th International Conference, GIScience 2006, Münster, Germany, September 20-23, 2006, Proceedings. Volume 4197 of Lecture Notes in Computer Science, pages 234-250, Springer, 2006. [doi]