BARRERA F., V.; LÓPEZ-BONILLA, J.; SOSA P., J. Electromagnetic Superpotentials forthe Liénard - Wiechert Field. Communications in Physics, [S. l.], v. 19, n. 4, 2009. DOI: 10.15625/0868-3166/19/4/6408. Disponível em: https://vjs.ac.vn/index.php/cip/article/view/6408. Acesso em: 17 jan. 2022.