@article{AL_1966_5_1_a2,
     author = {M. A. Taitslin},
     title = {On elementary theories of commutative semigroups with},
     journal = {Algebra i logika},
     pages = {51--69},
     year = {1966},
     volume = {5},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1966_5_1_a2/}
}