@article{DAN_1962_144_5_a2,
     author = {B. R. Vainberg},
     title = {Asymptotic behavior of the fundamental solutions of hypo-elliptic equations in two variables and a problem with conditions at infinity},
     journal = {Doklady Akademii Nauk},
     pages = {958--961},
     publisher = {mathdoc},
     volume = {144},
     number = {5},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_144_5_a2/}
}