%0 Journal Article
%A Nelson, Evelyn
%T The Lattice of Equational Classes of Semigroups with Zero
%J Canadian mathematical bulletin
%D 1971
%P 531-534
%V 14
%N 4
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1971-094-3/
%R 10.4153/CMB-1971-094-3
%F 10_4153_CMB_1971_094_3