TY - JOUR AU - M. S. Smetanina TI - Levels of the Schrödinger operator with a perturbed non-local potential JO - Izvestiya Instituta Matematiki i Informatiki Udmurtskogo Gosudarstvennogo Universiteta PY - 2006 SP - 98 EP - 104 IS - 1 UR - http://geodesic.mathdoc.fr/item/IIMI_2006_1_a6/ LA - ru ID - IIMI_2006_1_a6 ER -