@article{DAN_1967_177_4_a9,
     author = {R. S. Saks},
     title = {A nonelliptic {Dirichlet} problem},
     journal = {Doklady Akademii Nauk},
     pages = {786--789},
     publisher = {mathdoc},
     volume = {177},
     number = {4},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_177_4_a9/}
}