Sung Lim, Chang. “Preparation and Upconversion Photoluminescence of Er3+ Yb3+ Co-Doped CaWO4 Particles via Microwave-Assisted Metathetic Route”. Asian Journal of Chemistry 25, no. 11 (June 6, 2013): 6255–6258. Accessed June 30, 2024. https://asianpubs.org/index.php/ajchem/article/view/25_12_89.