@article{DAN_1977_232_1_a7,
     author = {S. N. Naboko},
     title = {On the spectral analysis of nonselfadjoint operators},
     journal = {Doklady Akademii Nauk},
     pages = {36--39},
     publisher = {mathdoc},
     volume = {232},
     number = {1},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_232_1_a7/}
}