%0 Journal Article %A V. A. Sadovnichy %T The zeta-function and eigenvalues of differential operators %J Differencialʹnye uravneniâ %D 1974 %P 1276-1285 %V 10 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1974_10_7_a13/ %G ru %F DE_1974_10_7_a13