[1]
V. V. Eremenko, V. I. Fomin, і V. S. Kurnosov, «Phonon-assisted anti-Stokes excitation of the fluorescence of Mn2+ ions in the CsMnCl3 ּ 2H2O crystal», Fiz. Nizk. Temp., вип. 26, вип. 7, с. 658–663, Лип 2000.