1. Some Problems in Combinatorial Analysis;Abbott,1965
2. A Combinatorial Problem in Geometry;Erdös;Compositio Math.,1935
3. Combinatorial Relations and Chromatic Graphs;Greenwood;Canad. J. Math.,1955
4. Construction of Special Edge Chromatic Graphs;Kalbfleisch;Canad. Math. Bull.,1965
5. Chromatic Graphs and Ramsey's Theorem;Kalbfleisch,1966