共 16 条
[1]
ALBERTSON M, UNPUBLISHED
[2]
Albertson Michael O., 1979, GRAPH THEORY RELATED, P35
[3]
[Anonymous], 1895, ANN NY ACAD SCI, P7
[5]
Dirac G. A., 1957, J LONDON MATH SOC, V32, P436
[6]
Dirac G.A, 1956, J LOND MATH SOC, V31, P460
[7]
MAP-COLOUR THEOREMS
[J].
CANADIAN JOURNAL OF MATHEMATICS-JOURNAL CANADIEN DE MATHEMATIQUES,
1952, 4 (04)
:480-490
[8]
Dirac Gabriel A., 1952, J LOND MATH SOC, V27, P85, DOI 10.1112/jlms/s1-27.1.85
[9]
ERDOS P, 1969, PROOF TECHNIQUES GRA
[10]
Franklin P., 1934, J MATH PHYS, V13, P363