@article{AA_2009_21_1_a4,
     author = {I. Kachkovskii and N. Filonov},
     title = {Absolute continuity of the spectrum of a~periodic {Schr\"odinger} operator in a~multidimensional cylinder},
     journal = {Algebra i analiz},
     pages = {133--152},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2009_21_1_a4/}
}