@article{DAN_1957_114_3_a15,
     author = {Chen Chin-i},
     title = {A theorem on the uniqueness of the solution of a mixed problem for systems of linear partial differential equations},
     journal = {Doklady Akademii Nauk},
     pages = {508--511},
     publisher = {mathdoc},
     volume = {114},
     number = {3},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1957_114_3_a15/}
}