@article{ZNSL_2010_385_a3,
     author = {I. Kachkovskii and N. Filonov},
     title = {Absolute continuity of the spectrum of the periodic {Scr\"odinger} operator in a~layer and in a~smooth cylinder},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {69--82},
     publisher = {mathdoc},
     volume = {385},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2010_385_a3/}
}