SKRYPNIK, W. I. Two-dimensional Coulomb dynamics of two and three equal negative charges in the field of two equal fixed positive charges. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 68, n. 11, p. 1528–1539, 2016. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1939. Acesso em: 11 apr. 2025.