@article{DE_1987_23_9_a10,
     author = {I. E. Egorov},
     title = {Solvability of a boundary value problem for a high-order equation of mixed type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1560--1567},
     publisher = {mathdoc},
     volume = {23},
     number = {9},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_9_a10/}
}