1. , and , Acyclic coloring of graphs. Random Structures and Algorithms 2 (1991) 277–288.
2. Extremal Graph Theory. Academic Press, London (1978).
3. Random Graphs. Academic Press, London (1985).
4. and , Problems and results on 3-chromatic hypergraphs and some related questions. Infinite and Finite Sets. North-Holland, Amsterdam (1975).
5. An upper bound for the harmonious chromatic number of a graph