%0 Journal Article %A A. V. Abramyan %A V. A. Nogin %T Complex powers of second-order hypoelliptic operators with constant coefficients in $L_p$-spaces %J Differencialʹnye uravneniâ %D 1997 %P 1134-1135 %V 33 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1997_33_8_a17/ %G ru %F DE_1997_33_8_a17