%0 Journal Article
%A G.B. Shi
%A G.P. Wang
%T Z-mappings and a classification theorem.
%J Semigroup forum
%D 1996
%P 349-356
%V 52
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1996__52_3_135460/
%F SF_1996__52_3_135460