%0 Journal Article %A Bassett, Paul G. %T A Combinatorial Theorem %J Canadian mathematical bulletin %D 1966 %P 515-516 %V 9 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1966-062-2/ %R 10.4153/CMB-1966-062-2 %F 10_4153_CMB_1966_062_2