TY - JOUR AU - A. V. Alekseev AU - Yu. A. Zinin AU - V. I. Il'ichev AU - N. V. Sushilov TI - Long-period low-damping inversion in a two-level medium excited by weak polychromatic field JO - Doklady Akademii Nauk PY - 1990 SP - 1099 EP - 1102 VL - 312 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1990_312_5_a16/ LA - ru ID - DAN_1990_312_5_a16 ER -