The nearest neighbor problem in an abstract metric space. - Charles Feustel; Linda G. Shapiro (Pattern Recognit. Lett., 1982)

Efficient Graph Automorphism by Vertex Partitioning. - Glenn S. Fowler; Robert M. Haralick; F. Gail Gray; Charles Feustel; Charles M. Grinstead (Artif. Intell., 1983)

Exact Computation of 2-d intersections. - Clifford A. Shaffer; Charles Feustel (Graphics Gems III, 1992)