Roslinda Rasyid, Fatma Sri Wahyuni, Yanwirasti, and Dachriyanus. “Development and Validation of a HPLC Method for Determination and Quantification of α-­mangostin in Bark Extract of Garcinia Cowa Roxb”. International Journal of Research in Pharmaceutical Sciences, vol. 5, no. 4, Dec. 2014, pp. 283-6, https://ijrps.com/home/article/view/3852.