1. Graphs and their chromatic numbers;Behzad,1965
2. Graphs and Digraphs;Chartrand,1986
3. Total colourings of graphs;Chetwynd,1990
4. Regular graphs of high degree are 1-factorizable;Chetwynd,1985
5. Some refinements of the total chromatic number conjecture;Chetwynd,1988