The Asymmetric Periodically Forced Van Der Pol Oscillator. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 18, n. 1, p. 5787, 2025. DOI: 10.29020/nybg.ejpam.v18i1.5787. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/5787. Acesso em: 5 dec. 2025.