@article{AA_2004_16_2_a6,
     author = {R. G. Shterenberg},
     title = {An example of a periodic magnetic {Schr\"odinger} in operator with degenerate lower edge of the spectrum},
     journal = {Algebra i analiz},
     pages = {177--185},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2004_16_2_a6/}
}