Nguyen, X. L., T. N. L. Le, H. C. Nguyen, and T. M. L. Do. “Biological Characteristics of Poon Trees Calophyllum Inophyllum L. And Its Extracted Oil Used As Starting Material for Biodiesel Production”. CTU Journal of Innovation and Sustainable Development , no. Renewable Energy, July 2016, pp. 7-10, doi:10.22144/ctu.jsi.2016.002.