%0 Journal Article %A S. K. Sobolev %T On finite approximability of superintuitionistic logics %J Sbornik. Mathematics %D 1977 %P 257-268 %V 31 %N 2 %U http://geodesic.mathdoc.fr/item/SM_1977_31_2_a8/ %G en %F SM_1977_31_2_a8