%0 Journal Article %A Heinzer, William %A Ohm, Jack %T An Essential Ring Which is Not A v-Multiplication Ring %J Canadian journal of mathematics %D 1973 %P 856-861 %V 25 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1973-088-5/ %R 10.4153/CJM-1973-088-5 %F 10_4153_CJM_1973_088_5