BALANOV, Zalman; HOOTON, Edward; MURZA, Adrian. Periodic solutions of vdP and vdP-like systems on 3-Tori. Topological Methods in Nonlinear Analysis, [S. l.], v. 50, n. 1, p. 253–268, 2017. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2017.023. Acesso em: 9 jul. 2025.