@article{DAN_1964_154_6_a10,
     author = {L. E. Sadovskii},
     title = {On the structural definability of a locally nilpotent torsion-free group},
     journal = {Doklady Akademii Nauk},
     pages = {1283--1286},
     publisher = {mathdoc},
     volume = {154},
     number = {6},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_154_6_a10/}
}