%0 Journal Article %A A. A. Vinogradov %T Minimal quasi-varieties of rings and relation algebras %J Algebra i logika %D 1967 %P 3-10 %V 6 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/AL_1967_6_4_a1/ %G ru %F AL_1967_6_4_a1