DONG, Guangfeng; LLIBRE, Jaume. Periodic orbits for an autonomous version of the Duffing–Holmes oscillator. Nonlinear Analysis: Modelling and Control, [S. l.], v. 29, n. 6, p. 1120–1126, 2024. DOI: 10.15388/namc.2024.29.37850. Disponível em: https://www.zurnalai.vu.lt/nonlinear-analysis/article/view/37850. Acesso em: 7 jul. 2025.