%0 Journal Article
%A George M. Bergman
%T Hyperidentities of groups and semigroups.
%J Aequationes mathematicae
%D 1981
%P 50-65
%V 23
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1981__23_136890/
%F AM2_1981__23_136890