%0 Journal Article %A R. S. Ismagilov %A Sh. Sh. Sultanov %T Spectral Analysis of Certain Self-Adjoint Differential Operators in a Space with Indefinite Metric %J Matematičeskie zametki %D 2001 %P 568-580 %V 70 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_2001_70_4_a8/ %G ru %F MZM_2001_70_4_a8