%0 Journal Article %A Khan, Moharram A. %T Commutativity of rings with constraints involving a subset %J Czechoslovak Mathematical Journal %D 2003 %P 545-559 %V 53 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMJ_2003__53_3_a4/ %G en %F CMJ_2003__53_3_a4