%0 Journal Article %A G. G. Kazaryan %T Estimates of the $L_p$ norms of derivatives by a nonregular set of differential operators %J Differencialʹnye uravneniâ %D 1969 %P 911-921 %V 5 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1969_5_5_a12/ %G ru %F DE_1969_5_5_a12