%0 Journal Article
%A Goodman, A. W.
%T The Valence of Sums and Products
%J Canadian journal of mathematics
%D 1968
%P 1173-1177
%V 20
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-111-0/
%R 10.4153/CJM-1968-111-0
%F 10_4153_CJM_1968_111_0