共 5 条
[1]
Brouwer A. E., 1976, P C CNRS PROBLEMES C, P35
[2]
CAMMACK LA, 1991, IRREGULARITY STRENGT, V81, P113
[3]
Chartrand G., 1988, C NUMER, V64, P197
[4]
Lehel J., 1991, GRAPH THEORY COMBINA, V2, P765
[5]
Skolem T., 1957, Mathematica Scandinavica, V5, P57