MAHMOUD MUSTAFA, B. The Effect of Ionic Substitution on the E.P. of Superconductor using Madelung Method. Journal of Education and Science (JES), [S. l.], v. 22, n. 1, p. 78–92, 2009. DOI: 10.33899/edusj.2009.57434. Disponível em: https://ojs.uomosul.edu.iq/index.php/edusj/article/view/23973. Acesso em: 6 aug. 2025.