%0 Journal Article %A Nicholson, W. K. %T Local Group Rings %J Canadian mathematical bulletin %D 1972 %P 137-138 %V 15 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1972-025-1/ %R 10.4153/CMB-1972-025-1 %F 10_4153_CMB_1972_025_1