Some New Oscillation Results for Fourth-Order Neutral Differential Equations. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 13, n. 2, p. 185–199, 2020. DOI: 10.29020/nybg.ejpam.v13i2.3654. Disponível em: https://ejpam.com/index.php/ejpam/article/view/3654.. Acesso em: 5 may. 2024.