TY - JOUR AU - Yu. S. Barkovskii TI - Hypooscillatory and hyperoscillatory differential operators JO - Doklady Akademii Nauk PY - 1982 SP - 269 EP - 271 VL - 267 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1982_267_2_a1/ LA - ru ID - DAN_1982_267_2_a1 ER -