@article{DAN_1987_297_2_a6,
     author = {A. G. Myasnikov},
     title = {Elementary theories and abstract isomorphisms of},
     journal = {Doklady Akademii Nauk},
     pages = {290--293},
     publisher = {mathdoc},
     volume = {297},
     number = {2},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_297_2_a6/}
}