BUICĂ, A.; GARCÍA, I. A. Periodic solutions of the perturbed symmetric Euler top. Topological Methods in Nonlinear Analysis, [S. l.], v. 36, n. 1, p. 91–100, 2010. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2010.029. Acesso em: 1 mar. 2024.