Sung Lim, Chang. 2015. “Synthesis of NaGd(MoO4)2:Eu3+ Yb3+ Phosphors by Cyclic Microwave-Modified Sol-Gel Method and Their Upconversion Photoluminescence Properties”. Asian Journal of Chemistry 27 (10):3539-42. https://doi.org/10.14233/ajchem.2015.18715.