%0 Journal Article
%A P. G. Naumov
%T Modal logics that are conservative over intuitionistic predicate calculus
%J Vestnik Moskovskogo universiteta. Matematika, mehanika
%D 1991
%P 86-90
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VMUMM_1991_6_a17/
%G ru
%F VMUMM_1991_6_a17