Van Tao, Chau, Mai Van Nhon, and Trinh Hoa Lang. “DESIGNING THE POSITRON FIT PROGRAM TO CACULATE ANNIHILATION PARAMETERS OF POSITRON IN METALS AND ALLOYS”. VNUHCM Journal of Science and Technology Development 7, no. 8 (August 31, 2004): 32-37. Accessed May 15, 2025. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/3240.