Rajiv, A., M. Reddy, J. Uchil, and C. Reddy. “THERMAL AND OPTICAL PROPERTIES OF SODIUM-PHOSPHO - ZINC - NEODYMIUM OXIDE GLASS SYSTEM”. Journal of Advanced Scientific Research, Vol. 5, no. 02, May 2014, pp. 32-39, https://sciensage.info/index.php/JASR/article/view/187.