@article{DAN_1978_243_6_a11,
     author = {B. P. Paneah},
     title = {On a problem with oblique derivative},
     journal = {Doklady Akademii Nauk},
     pages = {1394--1397},
     year = {1978},
     volume = {243},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_243_6_a11/}
}