共 13 条
[1]
Barefoot C., 1987, J Comb Math Comb Comput, V1, P12
[3]
Chvatal V., 1973, Discrete Mathematics, V5, P215, DOI 10.1016/0012-365X(73)90138-6
[6]
Goddard W., 1990, Quaest. Math., V13, P217
[10]
Pippert R.E., 1972, Lecture Notes in Math, V303, P225