@article{DE_1998_34_3_a3,
     author = {T. Kusano and M. Naito},
     title = {A singular eigenvalue problem for the {Sturm{\textendash}Liouville} equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {303--312},
     year = {1998},
     volume = {34},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1998_34_3_a3/}
}