Numerically Robust Algorithm for Contructing Constrained Delaunay Triangulation. - Hiroshi Inagaki; Kokichi Sugihara (CCCG, 1994)

Why is the 3D Delaunay Triangulation Difficult to Construct. - Kokichi Sugihara; Hiroshi Inagaki (Inf. Process. Lett., 1995)

Topology-Oriented Implementation - An Approach to Robust Geometric Algorithms. - Kokichi Sugihara; Masao Iri; Hiroshi Inagaki; Toshiyuki Imai (Algorithmica, 2000)