HE, Ji-Huan. Frequency-Amplitude Relationship in Nonlinear Oscillators with Irrational Nonlinearities. Spectrum of Mechanical Engineering and Operational Research, [S. l.], v. 2, n. 1, p. 121–129, 2025. DOI: 10.31181/smeor21202535. Disponível em: https://smeor-journal.org/index.php/smeor/article/view/35.. Acesso em: 19 oct. 2025.