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Ratnakaram, YC and Reddy, Viswanadha A and Chakradhar, Sreekanth RP (2002) Electronic absorption spectra and energy gap studies of Er3+ ions in different chlorophosphate glasses. In: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 58 (8). pp. 1809-1822.
