@article{DAN_1988_302_1_a4,
     author = {J. V. Rybalov},
     title = {Interior and exterior {Neumann} problems for a degenerate elliptic},
     journal = {Doklady Akademii Nauk},
     pages = {24--27},
     publisher = {mathdoc},
     volume = {302},
     number = {1},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1988_302_1_a4/}
}