Sung Lim, Chang. 2014. “Preparation, Micromorphology and Optical Properties of SPION BaWO4:Er3+, Yb3+ Composites via Cyclic Microwave-Assisted Metathetic Route”. Asian Journal of Chemistry 26 (6):1857-60. https://doi.org/10.14233/ajchem.2014.16405.