%0 Journal Article
%A S. Lajos
%T A characterization of semilattices of  left groups
%J Matematički vesnik
%D 1972
%P 363 
%V 24
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MV_1972_24_1_a46/
%F MV_1972_24_1_a46