%0 Journal Article
%A A. P. Akimov
%T On imbeddings of classical modal calculi in constructive calculi
%J Doklady Akademii Nauk
%D 1979
%P 777-778
%V 247
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1979_247_4_a0/
%G ru
%F DAN_1979_247_4_a0