%0 Journal Article
%A V. V. Rybakov
%T Admissibility of rules of inference in the modal system $G$
%J Matematičeskie trudy
%D 1989
%P 120-138
%V 12
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MT_1989_12_a6/
%G ru
%F MT_1989_12_a6