Duong, Thuy, Kien Pham, Phuoc Nguyen, and Phuong Nguyen. 2013. “Production of Biodiesel from Vegetable Oils and Animal Fats in Waste Water”. Science and Technology Development Journal 16 (1), 5-11. https://doi.org/https://doi.org/10.32508/stdj.v16i1.1382.