ZHAO, L. Chinese mathematics for nonlinear oscillators. Topological Methods in Nonlinear Analysis, [S. l.], v. 31, n. 2, p. 383–387, 2008. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2008.030. Acesso em: 26 apr. 2024.