%0 Journal Article
%A Petrich, Mario
%T Congruences on simple ω-semigroups
%J Glasgow mathematical journal
%D 1979
%P 87-101
%V 20
%N 2
%U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500003785/
%R 10.1017/S0017089500003785
%F 10_1017_S0017089500003785