%0 Journal Article %A Morais, Roberto J. F. de %T On some commutativity theorems for finite rings and finite groups %J Czechoslovak Mathematical Journal %D 2000 %P 245-247 %V 50 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMJ_2000__50_2_a1/ %G en %F CMJ_2000__50_2_a1