@article{DAN_1962_142_6_a8,
     author = {B. V. Melent'ev},
     title = {An existence theorem for the solution of a boundary-value problem for an equation of mixed type},
     journal = {Doklady Akademii Nauk},
     pages = {1251--1254},
     publisher = {mathdoc},
     volume = {142},
     number = {6},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_142_6_a8/}
}