1. Graphs and Hypergraphs. North Holland, New York (1976).
2. Graphs of given diameter. Theory of Graphs, and ös, Eds. Academic, New York (1968) 29–36.
3. Graphs with given diameter and maximal valency. Combinatorial Mathematics and its Applications, Ed. Academic, New York (1969) 25–37.
4. On graphs with diameter 2
5. An Extremal Problem of Graphs with Diameter 2