Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1971_7_7_a6, author = {V. S. Vinogradov}, title = {A certain boundary value problem for an elliptic system of special form}, journal = {Differencialʹnye uravneni\^a}, pages = {1226--1234}, publisher = {mathdoc}, volume = {7}, number = {7}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1971_7_7_a6/} }
V. S. Vinogradov. A certain boundary value problem for an elliptic system of special form. Differencialʹnye uravneniâ, Tome 7 (1971) no. 7, pp. 1226-1234. http://geodesic.mathdoc.fr/item/DE_1971_7_7_a6/