%0 Journal Article
%A Cordes, Craig M.
%T Semigroups of non-negative integral matrices
%J Glasgow mathematical journal
%D 1974
%P 39-42
%V 15
%N 1
%U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500002081/
%R 10.1017/S0017089500002081
%F 10_1017_S0017089500002081