%0 Journal Article
%A Drbohlav, Karel
%T Concerning congruence relations on commutative semigroups (Preliminary communication)
%J Commentationes Mathematicae Universitatis Carolinae
%D 1963
%P 11-13
%V 04
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_1963__4_1_a1/
%G en
%F CMUC_1963__4_1_a1