@article{IIMI_2006_1_a3,
     author = {Yu. P. Chuburin},
     title = {Two-dimensional magnetic {Schrodinger} operator with a periodic exterior field},
     journal = {Izvestiya Instituta Matematiki i Informatiki Udmurtskogo Gosudarstvennogo Universiteta},
     pages = {77--82},
     year = {2006},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIMI_2006_1_a3/}
}