A Modification of Atomic Orbital Theory and Its Application to $(1snl)^1L^{\pi}$ and $(nl^2)L^{\pi}$ Excited States of He-Like Ions. Journal of Atomic and Molecular Sciences, [S. l.], v. 1, n. 2, p. 103–117, 2010. DOI: 10.4208/jams.022510.031010a. Disponível em: https://www.global-sci.com/index.php/jams/article/view/14557. Acesso em: 5 dec. 2025.