@article{MZM_1972_12_4_a6,
     author = {Yu. Muratov},
     title = {Asymptotic bounds for the eigenvalues and eigenvectors of a perturbed linear non-self-conjugate operator},
     journal = {Matemati\v{c}eskie zametki},
     pages = {403--412},
     publisher = {mathdoc},
     volume = {12},
     number = {4},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1972_12_4_a6/}
}