%0 Journal Article %A V. V. Rybakov %T Hereditarily finitely axiomatizable extensions of the logic S4 %J Algebra i logika %D 1976 %P 185-204 %V 15 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/AL_1976_15_2_a3/ %G ru %F AL_1976_15_2_a3