@article{DAN_1965_164_4_a8,
     author = {A. Yanushauskas},
     title = {On the problem of the oblique derivative},
     journal = {Doklady Akademii Nauk},
     pages = {753--756},
     publisher = {mathdoc},
     volume = {164},
     number = {4},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_164_4_a8/}
}