Fan, Jie-Ping, Rui-Fen Zhang, and Jian-Hang Zhu. 2010. “Optimization of Microwave Assisted Extraction of Total Triterpenoid in Diospyros Kaki Leaves Using Response Surface Methodology”. Asian Journal of Chemistry 22 (5):3487-3500. https://asianpubs.org/index.php/ajchem/article/view/11573.