%0 Journal Article %A Yu. G. Kondrat'ev %T Dirichlet operators and the smoothness of solutions of %J Doklady Akademii Nauk %D 1985 %P 269-273 %V 282 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1985_282_2_a1/ %G ru %F DAN_1985_282_2_a1