%0 Journal Article %A Courter, Richard %T Finite Direct Sums of Complete Matrix Rings over Perfect Completely Primary Rings %J Canadian journal of mathematics %D 1969 %P 430-446 %V 21 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1969-047-0/ %R 10.4153/CJM-1969-047-0 %F 10_4153_CJM_1969_047_0