%0 Journal Article
%A G. Grätzer
%A J. Płonka
%T A characterization of semilattices
%J Colloquium Mathematicum
%D 1970
%P 21-24
%V 22
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/cm-22-1-21-24/
%R 10.4064/cm-22-1-21-24
%G en
%F 10_4064_cm_22_1_21_24