Khoi, T. M., Toan, N. D., Cong, N. C. and Hong, N. K. D. (2013) “Conversion of feedstocks with high free fatty acid content into biodiesel, using bifunctional heterogeneous catalyst”, Petrovietnam Journal, 80, pp. 36-45. Available at: http://www.pvj.com.vn/index.php/TCDK/article/view/696 (Accessed: 12December2024).