H. AL-SHAMMA, S.; I. AZAWI, M. A suitable analytical formula for the K shell ionization cross section of carbon and potassium atoms by electron impact. Journal of Education and Science, [S. l.], v. 26, n. 3, p. 18–22, 2013. DOI: 10.33899/edusj.2013.89914. Disponível em: https://edusj.uomosul.edu.iq/index.php/edusj/article/view/41568. Acesso em: 10 sep. 2025.