%0 Journal Article %A Ryszard R. Andruszkiewicz %A Magdalena Sobolewska %T Commutative reduced %J Algebra and discrete mathematics %D 2007 %P 18-26 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/ADM_2007_3_a3/ %G en %F ADM_2007_3_a3