@article{DE_1977_13_5_a17,
     author = {M. V. Butrov},
     title = {A certain type of perturbed {Bessel} equation, and a particular solution of it},
     journal = {Differencialʹnye uravneni\^a},
     pages = {947--948},
     publisher = {mathdoc},
     volume = {13},
     number = {5},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1977_13_5_a17/}
}