%0 Journal Article %A Clark, W. Edwin %T Affine semigroups over an arbitrary field† %J Glasgow mathematical journal %D 1965 %P 80-92 %V 7 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S2040618500035231/ %R 10.1017/S2040618500035231 %F 10_1017_S2040618500035231