@article{DE_1984_20_1_a15,
     author = {F. A. Tagiev and T. G. Kyazimov},
     title = {Existence, uniqueness and approximate solution of a boundary value problem for an equation of mixed type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {128--132},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1984_20_1_a15/}
}