Sung Lim, Chang. “Fabrication and Upconversion Photoluminescence of CaMoO4: Er3+, Yb3+ Particles by A Cyclic Microwave-Assisted Metathetic Method”. Asian Journal of Chemistry, vol. 24, no. 12, Aug. 2012, pp. 5659-61, https://asianpubs.org/index.php/ajchem/article/view/9946.