SKRYPNIK, W. I. Periodic and Bounded Solutions of the Coulomb Equation of Motion of Two and Three Point Charges with Equilibrium in the Line. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 66, n. 5, p. 679–693, 2014. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2169. Acesso em: 5 dec. 2025.