%0 Journal Article
%A M. F. Raţă
%T Nontabularity of the logic ${\rm S}4$ with respect to
%J Algebra i logika
%D 1982
%P 283-320
%V 21
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AL_1982_21_3_a2/
%G ru
%F AL_1982_21_3_a2