V.Shanmugam, and S.Bangaru. “Luminescence Properties on Tm3+ Doped KBr Single Crystals”. International Journal of Advance Engineering and Research Development (IJAERD) 4, no. 17 (August 23, 2022): -. Accessed July 6, 2025. https://ijaerd.org/index.php/IJAERD/article/view/6268.