%0 Journal Article %A T. K. Katsaran %T Application of the method of similar operators in the study of the spectral properties of differential operators of Sturm--Liouville type %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1991 %P 72-75 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1991_6_a14/ %G ru %F IVM_1991_6_a14