%0 Journal Article %A V. A. Krasnov %A A. S. Fokht %T Integral estimates of the fractional derivatives of the solutions of linear equations of elliptic type in the $L_2$ metric.~I %J Differencialʹnye uravneniâ %D 1975 %P 1042-1053 %V 11 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1975_11_6_a9/ %G ru %F DE_1975_11_6_a9