Vu Thi Phuong Thao. “THE ROLE OF FAMA - FRENCH THREE FACTOR MODEL IN THE ESTIMATED RATIO OF THE STOCK RETURNS IN THE VIETNAM SECURITIES MARKET”. Journal of Applied Science and Technology, Vol 20, Tháng Giêng 2019, tr 60-66, http://jst.utehy.edu.vn/index.php/jst/article/view/63.