%0 Journal Article %A E. M. Russakovskii %T Operator treatment of boundary problems with spectral parameters entering via polynomials in the boundary conditions %J Funkcionalʹnyj analiz i ego priloženiâ %D 1975 %P 91-92 %V 9 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1975_9_4_a23/ %G ru %F FAA_1975_9_4_a23