TY - JOUR AU - A. B. Antonevich AU - A. V. Lebedev TI - Nonlocal pseudo-differential operators: index and Lefschetz numbers JO - Differencialʹnye uravneniâ PY - 1997 SP - 795 EP - 799 VL - 33 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1997_33_6_a11/ LA - ru ID - DE_1997_33_6_a11 ER -