KHASHAN, M. Motawi; SYAM, Muhammed I.; ALOMARI, A.K. Numerical solution of cubic free undamped Duffing oscillator equation using continuous implicit hybrid method. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 42, p. 588–597, 2019. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/7208. Acesso em: 27 oct. 2026.