Altaf, M., M. Ashraf Chaudhry, and Maria Zahid. “STUDY OF OPTICAL BAND GAP OF ZINC-BORATE GLASSES”. Journal of Research (Science) 14, no. 2 (June 25, 2003): Pages: 253–259. Accessed January 16, 2026. http://jorscience.com/index.php/JRS/article/view/159.