%0 Journal Article
%A V. V. Rybakov
%T Noncompact extensions of the logic ${\rm S}4$
%J Algebra i logika
%D 1977
%P 472-490
%V 16
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AL_1977_16_4_a8/
%G ru
%F AL_1977_16_4_a8