TY - JOUR AU - L. I. Danilov TI - On the spectrum of a two-dimensional generalized periodic Schr\"odinger operator JO - Izvestiya Instituta Matematiki i Informatiki Udmurtskogo Gosudarstvennogo Universiteta PY - 2013 SP - 78 EP - 95 VL - 41 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IIMI_2013_41_1_a2/ LA - ru ID - IIMI_2013_41_1_a2 ER -