@article{UZKU_2006_148_2_a13,
     author = {A. M. Sidorov},
     title = {On an analytic perturbation theory for nonselfadjoint operators},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {144--150},
     year = {2006},
     volume = {148},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_2006_148_2_a13/}
}