@article{AL_1997_36_5_a3,
     author = {E. A. Zakhryamin},
     title = {Semigroups of bounded residue in ultraproducts of finite},
     journal = {Algebra i logika},
     pages = {531--542},
     year = {1997},
     volume = {36},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1997_36_5_a3/}
}