ISHCHENKO, S. Evaluation of many-electron atomic integrals using a Hylleraas-type basis. Numerical Methods and Programming (Vychislitel’nye Metody i Programmirovanie), [S. l.], v. 7, n. 7, p. 50–60, 2006. Disponível em: https://en.num-meth.ru/index.php/journal/article/view/193. Acesso em: 2 may. 2024.