%0 Journal Article
%A M.V. Lawson
%T Extending partial isomorphisms and McAlister's covering theorem.
%J Semigroup forum
%D 1994
%P 18-27
%V 48
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1994__48_3_135293/
%F SF_1994__48_3_135293