%0 Journal Article %A I. A. Kipriyanov %T Boundary value problems for singular elliptic partial differential operators %J Doklady Akademii Nauk %D 1970 %P 32-35 %V 195 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1970_195_1_a6/ %G ru %F DAN_1970_195_1_a6