GRACE, Said R.; GRAEF, John R. Oscillatory behavior of higher order nonlinear difference equations. Mathematical Modelling and Analysis, [S. l.], v. 25, n. 4, p. 522–530, 2020. DOI: 10.3846/mma.2020.11447. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/11447. Acesso em: 29 jun. 2025.