%0 Journal Article
%A B. Billhardt
%T On a wreath product embedding  and idempotent   pure congruences on inverse semigroups.
%J Semigroup forum
%D 1992
%P 45-54
%V 45
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1992__45_3_135170/
%F SF_1992__45_3_135170