@article{DE_1989_25_6_a16,
     author = {M. Yu. Yunusov},
     title = {A nonstandard boundary value problem that contains a small parameter},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1028--1035},
     year = {1989},
     volume = {25},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_6_a16/}
}