Ratnakaram, Y C and Srihari, N V and Kumar, A Vijaya and Thirupathi Naidu, D and Chakradhar, R P S (2009) Optical absorption and photoluminescence properties of Nd3+ doped mixed alkali phosphate glasses-spectroscopic investigations. Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy, 72 (1). pp. 171-177. ISSN 1386-1425

Ratnakaram, Y C and Srihari, N V and Naidu, D T and Vijayakumar, A and Chakradhar, R P S (2008) Spectroscopic investigations on Ho3+ doped mixed alkali phosphate glasses. Optical Materials , 30 (10). pp. 1635-1643. ISSN 0925-3467