%0 Journal Article %A A. R. Esayan %A V. Ya. Stetsenko %T Estimates of the spectrum of integral operators and infinite matrices %J Doklady Akademii Nauk %D 1964 %P 254-257 %V 157 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1964_157_2_a2/ %G ru %F DAN_1964_157_2_a2