%0 Journal Article %A Howard E. Bell %T On commutativity of P.I. rings. (Short Communication). %J Aequationes mathematicae %D 1983 %P 121-121 %V 26 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1983__26_136991/ %F AM2_1983__26_136991