TY - JOUR AU - L. I. Danilov TI - On absence of eigenvalues in the spectra of two-dimensional periodic Dirac and Schr\"odinger operators JO - Izvestiya Instituta Matematiki i Informatiki Udmurtskogo Gosudarstvennogo Universiteta PY - 2004 SP - 49 EP - 84 VL - 29 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IIMI_2004_29_1_a2/ LA - ru ID - IIMI_2004_29_1_a2 ER -