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Smid, Michiel Algorithms and Complexity, MPI for Informatics, Max Planck Society;
http://www.cccg.ca/proceedings/1996/cccg1996_0002.pdf (Any fulltext)
Gupta, P., Janardan, R., & Smid, M. (1996). Efficient Algorithms for Counting and Reporting Pairwise Intersections Between Convex Polygons. In F. Fiala, & E. Kranakis (Eds.), Proceedings of the 8th Canadian Conference on Computational Geometry (pp. 8-13). Ottawa: Carleton University Press.