%0 Journal Article %A Ayoub, Christine W. %T On finite primary rings and their groups of units %J Compositio Mathematica %D 1969 %P 247-252 %V 21 %N 3 %I Wolters-Noordhoff Publishing %U http://archive.numdam.org/item/CM_1969__21_3_247_0/ %G en %F CM_1969__21_3_247_0