TY - JOUR AU - S. I. Mitrokhin TI - On the study of the spectrum of a functional-differential operator with a summable potential JO - Vladikavkazskij matematičeskij žurnal PY - 2019 SP - 38 EP - 57 VL - 21 IS - 2 UR - http://geodesic.mathdoc.fr/item/VMJ_2019_21_2_a3/ LA - ru ID - VMJ_2019_21_2_a3 ER -