@article{AL_1966_5_4_a4,
     author = {M. A. Taitslin},
     title = {On elementary theories of commutative semigroups},
     journal = {Algebra i logika},
     pages = {55--89},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1966_5_4_a4/}
}