Peter Fishburn

1999

Article Title:  Duplicate Distances in Subsets of Finite Planar Sets

Co-Author:  Paul Erdös

Vol Issue:  Vol VIII (3) 1999 

Page:  73

1992

Article Title:  On an Erdös Problem for Distinct Distances in Convex Polygons

Vol Issue:  Vol X (1) 1992 

Page:  17