%0 Journal Article %A I. B. Kozhukhov %T Semigroup rings of free left ideals %J Algebra i logika %D 1982 %P 37-59 %V 21 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/AL_1982_21_1_a2/ %G ru %F AL_1982_21_1_a2