Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1972_8_11_a16, author = {V. N. Sedov}, title = {Non-regular differential operators. {Elliptic} equations}, journal = {Differencialʹnye uravneni\^a}, pages = {2048--2061}, publisher = {mathdoc}, volume = {8}, number = {11}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1972_8_11_a16/} }
V. N. Sedov. Non-regular differential operators. Elliptic equations. Differencialʹnye uravneniâ, Tome 8 (1972) no. 11, pp. 2048-2061. http://geodesic.mathdoc.fr/item/DE_1972_8_11_a16/