TY - JOUR AU - L. I. Danilov TI - On absence of eigenvalues in the spectra of two-dimensional periodic Dirac and Schrödinger operators JO - Izvestiya Instituta Matematiki i Informatiki Udmurtskogo Gosudarstvennogo Universiteta PY - 2004 SP - 49 EP - 84 IS - 1 UR - http://geodesic.mathdoc.fr/item/IIMI_2004_1_a2/ LA - ru ID - IIMI_2004_1_a2 ER -