Sung Lim, Chang. “Synthesis of NaLa(MoO4)2:Eu3+ Yb3+ Phosphors via Microwave-Modified Sol-Gel Route and Their Upconversion Photoluminescence Properties”. Asian Journal of Chemistry, vol. 27, no. 9, May 2015, pp. 3289-92, doi:10.14233/ajchem.2015.18569.