Tuyen, Luong Van, Trinh Thanh Son, Bui Thi Huong, Ngo Hong Anh, and Hoang Thi Phuong. 2016. “Study on the Characteristics of Nanosilica-Surfactant Complex and Its Oil Displacement Efficiency”. Petrovietnam Journal 5 (May), 36-42. https://pvj.vn/index.php/TCDK/article/view/509.