1. A Survey of (m, k)-Colorings;Quo Vadis, Graph Theory? - A Source Book for Challenges and Directions;1993
2. Gabriel Andrew Dirac;Graph Theory in Memory of G.A. Dirac;1988
3. Graph factorization and theorems of the Nordhaus—Gaddum class;Periodica Mathematica Hungarica;1984-09
4. SOME THEOREMS OF THE NORDHAUS–GADDUM CLASS;Finite and Infinite Sets;1984
5. Inequalities for the chromatic numbers of graphs;Journal of Combinatorial Theory, Series B;1974-02