%0 Journal Article %A E. A. Palyutin %T Categorical positive Horn theories %J Algebra i logika %D 1979 %P 47-72 %V 18 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/AL_1979_18_1_a3/ %G ru %F AL_1979_18_1_a3