%0 Journal Article %A Salem, Refaat M. %T Skew polynomial rings satisfying - property. %J Portugaliae mathematica %D 1994 %P 63-69 %V 51 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1994__51_1_47201/ %G en %F PORMA_1994__51_1_47201