@article{DAN_1964_155_1_a3,
     author = {B. R. Vainberg},
     title = {Hypo-elliptic equations in the whole space and the principle of limiting absorption},
     journal = {Doklady Akademii Nauk},
     pages = {20--23},
     publisher = {mathdoc},
     volume = {155},
     number = {1},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_155_1_a3/}
}