@article{ZNSL_2013_411_a7,
     author = {A. M. Levin},
     title = {The spectrum of a~perturbation of a~hyperbolic toral automorphism},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {125--134},
     year = {2013},
     volume = {411},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2013_411_a7/}
}