%0 Journal Article %A Farley, Reuben W. %T An Iseomorphism Theorem for Positive Commutative Semigroups on the Plane %J Mathematica slovaca %D 1973 %P 136-146 %V 23 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1973__23_2_a6/ %G en %F MASLO_1973__23_2_a6