Cong Hao, Le, Nguyen Dinh Gam, Ho Viet Sinh, and Mai Van Nhon. 2008. “USING MIXED STANDARD SOURCE FOR STUDYING AND OPERATING THE ALPHA ANALYST”. Science and Technology Development Journal 11 (6), 79-84. https://doi.org/https://doi.org/10.32508/stdj.v11i6.2653.