%0 Journal Article %A G. E. Puninskii %T Rings defined by purities %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1993 %P 181-182 %V 48 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1993_48_6_a16/ %G en %F RM_1993_48_6_a16