Sung Lim, Chang. “Cyclic Microwave-Modified Sol-Gel Process of NaY(WO4)2:Ho3+ Yb3+ Phosphors and Their Upconversion Photoluminescence Properties”. Asian Journal of Chemistry 26, no. 27 (December 24, 2014): 73–76. Accessed November 25, 2024. https://asianpubs.org/index.php/ajchem/article/view/26_27_16.