@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/}
}