Bich, N. T. N., T. T. Son, H. Linh, P. V. Anh, H. T. Phuong, L. V. Tuyen, K. A. Trung, C. T. V. Nga, and N. H. Anh. “Research on Preparation and Evaluation of Acid Microemulsion System for Near-Well Bore Treatment in Sandstone Formation”. Petrovietnam Journal, Vol. 3, Mar. 2015, pp. 32-39, https://pvj.com.vn/index.php/TCDK/article/view/442.