%0 Journal Article %A Z. V. Shoniya %T Estimation of the spectral function for nonsemibounded selfadjoint extensions of the Schr\"odinger operator in an arbitrary three-dimensional domain and a kernel of fractional rank %J Doklady Akademii Nauk %D 1985 %P 1106-1110 %V 283 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1985_283_5_a19/ %G ru %F DAN_1985_283_5_a19