%0 Journal Article %A Brown, William G. %T A New Proof of a Theorem of Dirac %J Canadian mathematical bulletin %D 1965 %P 459-463 %V 8 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1965-032-8/ %R 10.4153/CMB-1965-032-8 %F 10_4153_CMB_1965_032_8