@article{AL_1969_8_5_a2,
     author = {M. A. Taitslin},
     title = {Equivalence of automata with respect to a commutative semigroup},
     journal = {Algebra i logika},
     pages = {553--600},
     publisher = {mathdoc},
     volume = {8},
     number = {5},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1969_8_5_a2/}
}