共 3 条
[1]
DIRAC G, 1960, CR HEBD ACAD SCI, V250, P4252
[2]
Dirac G.A., 1960, MATH NACHR, V22, P61, DOI [DOI 10.1002/MANA.19600220107, 10.1002/mana.19600220107]
[3]
Ore O., 1962, THEORY GRAPHS