1. A First Course in Combinatorial Mathematics;Anderson,1974
2. Counting paths, circuits, chains, and cycles in graphs: a unified approach;Biondi;Canad. J. Math.,1970
3. Pancyclic graphs I;Bondy;J. Combin. Theory,1971
4. Examples and Counterexamples in Graph Theory;Capobianco,1978
5. On the number of cycles in a graph;Harary;Mat. Časopis Sloven. Akad. Vied.,1971