SIMULIK, V. M. Solutions of the Maxwell equations describing the spectrum of hydrogen. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 49, n. 7, p. 958–969, 1997. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5087. Acesso em: 5 dec. 2025.