Dynamic Analysis and Accurate Analytical Solution of the Hybrid Duffing-Van der pol Oscillator via a Modified Homotopy Perturbation Method . JOURNAL OF UNIVERSITY OF BABYLON for Pure and Applied Sciences, [S. l.], v. 34, n. 2, p. 189–211, 2026. DOI: 10.29196/jubpas.v34i2.6612. Disponível em: https://www.journalofbabylon.com/index.php/JUBPAS/article/view/6612. Acesso em: 30 jun. 2026.