1. Graphes et Hypergraphes;Berge,1970
2. Graph Theory;Biggs,1976
3. Graphs with prescribed degrees of vertices;Erdös;Mat. Lapok,1960
4. Die Theorie der regularen Graphs;Petersen;Acta Math.,1891
5. The factorization of linear graphs;Tutte;J. London Math. Soc.,1947