1. Färbung von Graphen, deren sämtliche bzw. deren ungerade Kreise stan sind;Berge,1961
2. Graphs and Hypergraphs;Berge,1972
3. A composition for perfect graphs;Bixby,1984
4. Polynomial algorithm to recognize a Meyniel graph;Burlet,1984
5. Graph decomposition for undirected graphs;Cowan,1972