TY - JOUR AU - S. V. Petrushkin AU - V. V. Samartsev TI - Optical Cooling of Dye-Doped Polymer Films during Photon Echo Emission JO - Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki PY - 2009 SP - 145 EP - 149 VL - 151 IS - 1 UR - http://geodesic.mathdoc.fr/item/UZKU_2009_151_1_a18/ LA - ru ID - UZKU_2009_151_1_a18 ER -