Sung Lim, Chang. 2014. “Spectroscopic Study and Green Upconversion of BaGd2(MoO4)4:Er3+ Yb3+ Phosphors via Cyclic Microwave-Modified Sol-Gel Route”. Asian Journal of Chemistry 27 (1):297-300. https://doi.org/10.14233/ajchem.2015.17406.