%0 Journal Article
%A Figallo, Aldo V.
%T On the congruences in four-valued modal algebras
%J Portugaliae mathematica
%D 1992
%P 249-261
%V 49
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PORMA_1992__49_2_115790/
%G en
%F PORMA_1992__49_2_115790