%0 Journal Article %A L. I. Danilov %T On the spectrum of a two-dimensional generalized periodic Schrödinger operator %J Izvestiya Instituta Matematiki i Informatiki Udmurtskogo Gosudarstvennogo Universiteta %D 2013 %P 78-95 %N 1 %U http://geodesic.mathdoc.fr/item/IIMI_2013_1_a2/ %G ru %F IIMI_2013_1_a2