%0 Journal Article %A M. Sh. Birman %A M. Z. Solomyak %T Spectral asymptotics of nonsmooth elliptic operators %J Doklady Akademii Nauk %D 1972 %P 267-270 %V 205 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1972_205_2_a1/ %G ru %F DAN_1972_205_2_a1