@article{DAN_1989_307_4_a7,
     author = {E. A. Larionov},
     title = {Asymptotics of eigenvalues under weak perturbation of normal},
     journal = {Doklady Akademii Nauk},
     pages = {802--806},
     publisher = {mathdoc},
     volume = {307},
     number = {4},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_307_4_a7/}
}