@article{DAN_1975_221_5_a7,
     author = {V. P. Orlov and P. E. Sobolevskii},
     title = {On the resolvent of a degenerate operator in {Banach} space},
     journal = {Doklady Akademii Nauk},
     pages = {1035--1037},
     publisher = {mathdoc},
     volume = {221},
     number = {5},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_221_5_a7/}
}