Don Greenwell

1993

Article Title: Functions Which Preserve Unit Distance

Co-Author:  Peter D. Johnson Jr.

Vol Issue:  Vol II (3) 1993 

Page:  61

1992

Article Title:  Forbidding Prescribed Distances for Denigrated Colors

Co-Author:  Peter D. Johnson Jr.

Vol Issue:  Vol II (1) 1992

Page:  13