The shape of the emission band of the -dopant in oxyfluoride nano-scaled glass-ceramicsV. D. Rodríguez, V. K. Tikhomirov, J. Méndez-Ramos and A. B. SeddonEurophys. Lett., 69 1 (2005) 128-134DOI: https://doi.org/10.1209/epl/i2004-10314-3