TY - JOUR AU - B. M. Levitan AU - A. V. Savin TI - Examples of Schr\"odinger operators with almost-periodic potentials and nowhere-dense absolutely continuous spectrum JO - Doklady Akademii Nauk PY - 1984 SP - 539 EP - 542 VL - 276 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1984_276_3_a5/ LA - ru ID - DAN_1984_276_3_a5 ER -