Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1977_13_4_a5, author = {N. J. Yurchuk}, title = {L\"osbarkeit von {Randwertproblemen} f\"ur einige {Operator-} {Differentialgleichungen}}, journal = {Differencialʹnye uravneni\^a}, pages = {626--636}, publisher = {mathdoc}, volume = {13}, number = {4}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1977_13_4_a5/} }
N. J. Yurchuk. L\"osbarkeit von Randwertproblemen f\"ur einige Operator- Differentialgleichungen. Differencialʹnye uravneniâ, Tome 13 (1977) no. 4, pp. 626-636. http://geodesic.mathdoc.fr/item/DE_1977_13_4_a5/