Nguyen Thi Thuy Huong , Nguyen Phuong Anh. 2020. “Estimating Potential Gains from Banks Mergers in Vietna Using Two-Stage Data Envelopment Analysis”. International Journal of Advanced Science and Technology 29 (10s), 904 -16. http://sersc.org/journals/index.php/IJAST/article/view/14529.