TY - JOUR AU - Yu. V. Pokornyi AU - S. V. Smitskikh TI - Inversion of the oscillatory property of focusing operators JO - Matematičeskie zametki PY - 1976 SP - 753 EP - 760 VL - 20 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1976_20_5_a15/ LA - ru ID - MZM_1976_20_5_a15 ER -