Chen, Xi, Jun Wang, Yue Han, Xiao-Ping Lu, and Ping-Fang Han. 2012. “Ultrasound Assisted Heteropoly Acid Catalyst SiW12 SiO2 for Synthesis of Benzyl Acetate”. Asian Journal of Chemistry 25 (2):623-27. https://doi.org/10.14233/ajchem.2013.11621.