@article{DE_2001_37_8_a1,
     author = {A. Yu. Andrianov},
     title = {A {Spectral} {Theorem} for {Sturm{\textendash}Liouville} {Operators} with {Potentials} {That} {Are} {Finite} {Sums} of {Exponentials}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1028--1040},
     year = {2001},
     volume = {37},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2001_37_8_a1/}
}