@article{DE_1999_35_8_a4,
     author = {Yu. A. Konyaev},
     title = {On the unique solvability of some classes of nonlinear regular and singularly perturbed boundary value problems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1028--1035},
     year = {1999},
     volume = {35},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1999_35_8_a4/}
}