Trinh, Lang, Tao Chau, Chien Le, Hong Huynh, and Tram Huynh. “Positron Annihilation Rate in Single Atom With Slater Type Orbital Approximation”. VNUHCM Journal of Science and Technology Development 16, no. 4 (December 31, 2013): 43-51. Accessed July 2, 2025. https://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/1595.