@article{DE_1995_31_6_a18,
     author = {T. S. Gadzhiev},
     title = {On the spectrum of some singular differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1082--1083},
     publisher = {mathdoc},
     volume = {31},
     number = {6},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1995_31_6_a18/}
}