%0 Journal Article %A M. A. Taitslin %T On elementary theories of commutative semigroups with %J Algebra i logika %D 1966 %P 51-69 %V 5 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/AL_1966_5_1_a2/ %G ru %F AL_1966_5_1_a2