Ha, Dao Thi Hai, Hoang Linh, and Luong Van Tuyen. “Synthesis of Pour Point Depressant Additives for Production and Transportation of High-Paraffin Bach Ho Crude Oil Based on Ester of Poly-Triethanolamine”. Petrovietnam Journal 50 (May 31, 2013): 26-35. Accessed April 17, 2026. https://www.pvj.vn/index.php/TCDK/article/view/662.