@article{DE_1986_22_12_a10,
     author = {A. R. Khalmukhamedov},
     title = {Expansions in eigenfunctions of a singular elliptic operator},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2107--2117},
     publisher = {mathdoc},
     volume = {22},
     number = {12},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_12_a10/}
}