%0 Journal Article %A O. Ya. Savchenko %T Determination of a domain inside of which there is an eigenvalue of a differential equation %J Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki %D 1985 %P 1327-1335 %V 25 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZVMMF_1985_25_9_a5/ %G ru %F ZVMMF_1985_25_9_a5