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@article{DE_1967_3_2_a13, author = {N. V. Krylov}, title = {The first boundary value problem for elliptic equations of second order}, journal = {Differencialʹnye uravneni\^a}, pages = {315--326}, publisher = {mathdoc}, volume = {3}, number = {2}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1967_3_2_a13/} }
N. V. Krylov. The first boundary value problem for elliptic equations of second order. Differencialʹnye uravneniâ, Tome 3 (1967) no. 2, pp. 315-326. http://geodesic.mathdoc.fr/item/DE_1967_3_2_a13/