共 20 条
[2]
Burr S. A., 1976, ARS COMBINATORIA, V1, P167
[3]
DUFFUS D, IN PRESS J GRAPH THE
[5]
GERARDS AMH, 1986, HOMOMORPHISMS GRAPHS
[6]
Giblin P. J., 1977, GRAPHS SURFACES HOMO
[7]
HAGGKVIST R, 1985, 11 STOCKH U MAT I RE
[9]
Harary F., 1969, GRAPH THEORY, DOI DOI 10.1201/9780429493768
[10]
HEDETNIEMI ST, 1966, 0310544T U MICH TECH