%0 Journal Article %A Zelmanowitz, J. %T Commutative Endomorphism Rings %J Canadian journal of mathematics %D 1971 %P 69-76 %V 23 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-007-x/ %R 10.4153/CJM-1971-007-x %F 10_4153_CJM_1971_007_x