@article{RM_1966_21_2_a14,
     author = {N. V. Krylov},
     title = {On solutions of elliptic equations of the second order},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1966},
     volume = {21},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1966_21_2_a14/}
}