%0 Journal Article %A Ashraf, Mohammad %T A commutativity theorem for associative rings %J Archivum mathematicum %D 1995 %P 201-204 %V 31 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_1995__31_3_a3/ %G en %F ARM_1995__31_3_a3