%0 Journal Article %A V. N. Gorchakov %T Asymptotic properties of the spectral function of hypoelliptic operators %J Doklady Akademii Nauk %D 1965 %P 746-749 %V 160 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1965_160_4_a1/ %G ru %F DAN_1965_160_4_a1