@article{DAN_1962_146_1_a5,
     author = {V. A. Kondrat'ev},
     title = {Bounds for the derivatives of solutions of elliptic equations near the boundary},
     journal = {Doklady Akademii Nauk},
     pages = {22--25},
     year = {1962},
     volume = {146},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_146_1_a5/}
}