%0 Journal Article %A K. Kh. Boimatov %T The distribution of eigenvalues of elliptic operators %J Doklady Akademii Nauk %D 1975 %P 265-268 %V 221 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1975_221_2_a0/ %G ru %F DAN_1975_221_2_a0