1. M. Behzad, Graphs and their chromatic numbers, Doctoral Thesis, Michigan State University, 1965.
2. Jr., The colour numbers of complete graphs;Behzad;J. London Math. Soc.,1967
3. Bor-Liang Chen, Hung-Lin Fu, Total colorings of graphs of order 2n having maximum degree 2n−2, Graphs Combin. 8 (1992) 119–123.
4. A.G. Chetwynd, Total colourings of graphs, in: R. Nelson, R.J. Wilson (Eds.), Graph colourings, Research Notes in Mathematics, No. 218, Pitman, Longman Scientific and Technical, London, 1990, pp. 65–78.
5. A.G. Chetwynd, A.J.W. Hilton, Some refinements of the total chromatic number conjecture, Congr. Numer. (1988) 195–215.