, G.C.L, E., L. , C.K, C. Y.L, and S. M.A. “Xanthones and Triterpenoids from Mesua Daphnifolia and Garcinia Maingayi”. Malaysian Journal of Science, vol. 24, no. 1, Jan. 2005, pp. 183-5, https://adum.um.edu.my/index.php/MJS/article/view/8969.