共 5 条
[1]
Descartes B., 1947, 3 COLOUR PROBLEM
[2]
Erdos P., 1959, CANADIAN J MATH, V11, P34
[3]
Harary F, 1969, J COMB THEORY, V6, P264, DOI [10.1016/S0021-9800(69)80086-4, DOI 10.1016/S0021-9800(69)80086-4]
[4]
Mycielski J, 1955, C MATH, V3, P161
[5]
Zykov A.A., 1949, MATEMATICHESKII SBOR, V66, P163