@article{DE_1982_18_8_a0,
     author = {T. G. Amangil'din},
     title = {A trace formula for a singular {Sturm{\textendash}Liouville} operator},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1291--1297},
     year = {1982},
     volume = {18},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1982_18_8_a0/}
}