1. Graphs and their chromatic numbers;Behzad,1965
2. Partial edge-colourings of complete graphs, or of graphs which are nearly complete;Chetwynd,1984
3. The chromatic index of graphs with a spanning star;Plantholt;J. Graph Theory,1981
4. On an estimate of the chromatic class of a p-graph;Vizing;Diskret. Analiz.,1964