Lars Kulik, Carola Eschenbach, Christopher Habel, Hedda Rahel Schmidtke. A Graded Approach to Directions between Extended Objects. In Max J. Egenhofer, David M. Mark, editors, Geographic Information Science, Second International Conference, GIScience 2002, Boulder, CO, USA, September 25-28, 2002, Proceedings. Volume 2478 of Lecture Notes in Computer Science, pages 119-131, Springer, 2002. [doi]
Abstract is missing.