@article{TRSPY_2008_261_a12,
     author = {Yu. A. Kordyukov and B. Helffer},
     title = {Periodic {Magnetic} {Schr\"odinger} {Operators:} {Spectral} {Gaps} and {Tunneling} {Effect}},
     journal = {Informatics and Automation},
     pages = {176--187},
     publisher = {mathdoc},
     volume = {261},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2008_261_a12/}
}