%0 Journal Article
%A Lee, Sin Min
%T On a simple one-element extension of left zero semigroups
%J Commentationes Mathematicae Universitatis Carolinae
%D 1980
%P 313-318
%V 21
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_1980__21_2_a9/
%G en
%F CMUC_1980__21_2_a9