Kokichi Sugihara Robust Geometric Computation Based on Topological Consistency. 12-26 2001 conf/iccS/2001-1 International Conference on Computational Science (1) http://link.springer.de/link/service/series/0558/bibs/2073/20730012.htm db/conf/iccS/iccS2001-1.html#Sugihara01