@article{DE_1975_11_5_a9,
     author = {V. P. Orlov and P. E. Sobolevskii},
     title = {The resolvent of a degenerate operator in a {Banach} space},
     journal = {Differencialʹnye uravneni\^a},
     pages = {858--868},
     publisher = {mathdoc},
     volume = {11},
     number = {5},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_5_a9/}
}