Calculation of Differential Cross Sections for Electron Impact Excitation of $H$ and $He^+$. Journal of Atomic and Molecular Sciences, [S. l.], v. 5, n. 4, p. 311–323, 2021. DOI: 10.4208/jams.022814.051414a. Disponível em: https://www.global-sci.com/index.php/jams/article/view/14722. Acesso em: 5 dec. 2025.