%0 Journal Article %A Yu. L. Ershov %T Axiomatizable classes of models with infinite signature %J Algebra i logika %D 1962 %P 32-44 %V 1 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/AL_1962_1_4_a1/ %G ru %F AL_1962_1_4_a1