%0 Journal Article
%A L. L. Maksimova
%T Definability in Normal Extensions of S4
%J Algebra i logika
%D 2004
%P 387-410
%V 43
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AL_2004_43_4_a0/
%G ru
%F AL_2004_43_4_a0