@article{DAN_1964_155_4_a1,
     author = {A. V. Bitsadze},
     title = {A special case of the problem of the oblique derivative for harmonic functions in three-dimensional domains},
     journal = {Doklady Akademii Nauk},
     pages = {730--731},
     publisher = {mathdoc},
     volume = {155},
     number = {4},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_155_4_a1/}
}