%0 Journal Article %A A. F. Ulitko %A A. G. Kiselevskii %A L. Shorfi %T Discrete spectrum of the Sturm--Liouville operator in the third boundary value problem for a truncated one-sheeted hyperboloid of revolution %J Differencialʹnye uravneniâ %D 1991 %P 1807-1812 %V 27 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1991_27_10_a18/ %G ru %F DE_1991_27_10_a18