@article{DE_1994_30_8_a17,
     author = {E. G. Sitnikova},
     title = {On an eigenfunction for a boundary value problem in a disk},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1457--1461},
     publisher = {mathdoc},
     volume = {30},
     number = {8},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1994_30_8_a17/}
}