A. KHALF , Ala’a. K-Shell Double Photoionization Cross Section of (Be, Mg and Ca) Atoms. University of Thi-Qar Journal of Science, University of Thi-Qar, Thi-Qar, Iraq, v. 3, n. 2, p. 206–209, 2012. Disponível em: https://jsci.utq.edu.iq/index.php/main/article/view/430.. Acesso em: 31 mar. 2025.