@article{DE_1995_31_10_a12,
     author = {A. P. Khromov},
     title = {Spectral analysis of differential operators on a finite interval},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1691--1696},
     publisher = {mathdoc},
     volume = {31},
     number = {10},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1995_31_10_a12/}
}