%0 Journal Article %A Wong, James C. S. %T Amenability and Substantial Semigroups %J Canadian mathematical bulletin %D 1976 %P 231-234 %V 19 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1976-036-7/ %R 10.4153/CMB-1976-036-7 %F 10_4153_CMB_1976_036_7