1. Graphs and Digraphs;Behzad,1979
2. Zero-Symmetric Graphs;Coxeter,1981
3. Generators and Relations for Discrete Groups;Coxeter,1972
4. Generators for alternating and symmetric groups;Dey;J. Austral. Math. Soc,1971
5. A one-regular graph of degree three;Frucht;Canadian J. Math,1952