@article{DAN_1961_137_1_a10,
     author = {I. A. Shishmarev},
     title = {Uniform estimates of the derivatives of the solutions of the {Dirichlet} and eigenfunction problems for the operator},
     journal = {Doklady Akademii Nauk},
     pages = {45--47},
     year = {1961},
     volume = {137},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_137_1_a10/}
}