@article{DAN_1971_199_2_a7,
     author = {V. A. Solonnikov},
     title = {On overdetermined elliptic boundary value problems},
     journal = {Doklady Akademii Nauk},
     pages = {279--281},
     publisher = {mathdoc},
     volume = {199},
     number = {2},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1971_199_2_a7/}
}