1. Extremal Graph Theory;Bollobás,1978
2. Graph Theory with Applications;Bondy,1977
3. Graps with unavoidable subgraphs with large degrees;Caccetta;J. Graph Theory,1988
4. On cycles in graphs;Caccetta;Ars Combin.,1987
5. Maximal Circuits of Graphs I;Woodall;Acta Math. Acad. Sci. Hungar.,1976