%0 Journal Article %A Ya. M. Zhileikin %T On a refinement of the bound of the spectral function of the Laplace operator %J Doklady Akademii Nauk %D 1961 %P 543-546 %V 141 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1961_141_3_a6/ %G ru %F DAN_1961_141_3_a6