TY - JOUR AU - I. M. Novitskii TI - Unitary equivalence between linear operators and integral operators with smooth kernels JO - Differencialʹnye uravneniâ PY - 1992 SP - 1608 EP - 1616 VL - 28 IS - 9 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1992_28_9_a15/ LA - ru ID - DE_1992_28_9_a15 ER -