共 5 条
- [1] Chartrand G., 1974, CASOPIS PROPESTOVANI, V99, P158
- [2] CHARTRAND G, 1973, STUDIA SCI MATH HUNG
- [3] Chvatal V., 1972, DISCRETE MATH, V2, P111, DOI [DOI 10.1016/0012-365X(72)90079-9, 10.1016/0012-365X(72)90079-9]
- [4] LESNIAKFOSTER L, 1977, J COMB THEORY B, V22, P263
- [5] NEBESKY L, 1973, CASOPIS PEST MAT, V98, P285