@article{DAN_1964_158_3_a3,
     author = {O. A. Ladyzhenskaya and V. Ya. Rivkind and N. N. Ural'tseva},
     title = {Classical solvability of diffraction problems for equations of elliptic and parabolic types},
     journal = {Doklady Akademii Nauk},
     pages = {513--515},
     publisher = {mathdoc},
     volume = {158},
     number = {3},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_158_3_a3/}
}