@article{IVM_1988_11_a10,
     author = {B. Bayasgalan and Yu. M. Vazhenin},
     title = {Decidability of theories of classes of powers of semigroups},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {62--64},
     publisher = {mathdoc},
     number = {11},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1988_11_a10/}
}