Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1983_19_1_a8, author = {A. I. Ibragimov}, title = {Solvability of a mixed problem for second-order elliptic equations}, journal = {Differencialʹnye uravneni\^a}, pages = {56--65}, publisher = {mathdoc}, volume = {19}, number = {1}, year = {1983}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1983_19_1_a8/} }
A. I. Ibragimov. Solvability of a mixed problem for second-order elliptic equations. Differencialʹnye uravneniâ, Tome 19 (1983) no. 1, pp. 56-65. http://geodesic.mathdoc.fr/item/DE_1983_19_1_a8/