AL DROUBI, Huda Abd- Al Mohaimen; SOUFAN, Abd Al Hadi Mostafa; BADAWI, Emad Abdel- Raouf. Analytical Studying of Positron Annihilation Equations. Journal of natural sciences, life and applied sciences, New Mexico, United States, v. 3, n. 4, p. 89–78, 2019. DOI: 10.26389/AJSRP.H040919. Disponível em: https://www.ajsrp.ojsexpert.com/index.php/jnslas/article/view/1987. Acesso em: 20 dec. 2025.