Paul O’Donnell

2000

Article Title: Arbitrary Girth, 4-Chromatic Unit Distance Graphs in the Plane Part 1: Graph Description

Vol Issue: Vol IX (3), 2000 

Page: 145

Article Title: Arbitrary Girth, 4-Chromatic Unit Distance Graphs in the Plane Part 2: Graph Embedding 

Vol Issue: Vol IX (4), 2000 

Page: 180

1996

Article Title: Some 4-Chromatic Unit-Distance Graphs Without Small Cycles

Vol Issue: Vol V (4), 1996 

Page: 137

1995

Article Title: A 40 Vertex 4-Chromatic Triangle-Free Unit Distance Graph

Vol Issue: Vol V (1), 1995 

Page: 30

1994

Article Title: A Triangle-free 4-chromatic Graph in the Plane

Vol Issue: Vol IV (1), 1994 

Page: 23

Article Title: Letter to the Editor

Vol Issue: Vol IV (1), 1994

 Page: 30

1993

Article Title: A Large Independent Set in the Unit Distance Graph

Co-Author: Robert Hochberg

Vol Issue: Vol II (4), 1993 

Page: 83