@article{DAN_1964_154_1_a21,
     author = {B. A. Sotskii and A. M. Goncharenko},
     title = {Condition for the generation of a two layered crystal},
     journal = {Doklady Akademii Nauk},
     pages = {91--93},
     publisher = {mathdoc},
     volume = {154},
     number = {1},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_154_1_a21/}
}