Distribution of Positron Annihilation Lifetime Components. Baghdad Science Journal, Iraq, Baghdad, v. 5, n. 2, p. 265–272, 2008. DOI: 10.21123/bsj.2008.11872. Disponível em: https://bsj-ojs.uobaghdad.edu.iq/index.php/BSJ/article/view/11872.. Acesso em: 18 jul. 2025.