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Vijayakumar, A and Chakradhar, RPS and Ratnakaram, YC (2006) Optical absorption and emission properties of $Pr^{3+}$ and $Er^{3+}$ in mixed alkali borate glasses. In: International Symposium on Non Oxide and new Optical Glasses (ISNOG), 10 - 14 April, 2006, Indian Institute of Science, Bangalore.
