%0 Journal Article %A B. R. Vainberg %T Asymptotic behavior of the fundamental solutions of hypo-elliptic equations in two variables and a problem with conditions at infinity %J Doklady Akademii Nauk %D 1962 %P 958-961 %V 144 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1962_144_5_a2/ %G ru %F DAN_1962_144_5_a2