%0 Journal Article %A S. I. Mitrokhin %T On the study of the spectrum of a functional-differential operator with a summable potential %J Vladikavkazskij matematičeskij žurnal %D 2019 %P 38-57 %V 21 %N 2 %U http://geodesic.mathdoc.fr/item/VMJ_2019_21_2_a3/ %G ru %F VMJ_2019_21_2_a3