Oscillation and nonoscillation criteria for second order difference equations with generalized difference operators. Punjab University Journal of Mathematics, [S. l.], v. 53, n. 10, p. 753–763, 2025. Disponível em: https://pujm.pu.edu.pk/index.php/pujm/article/view/298. Acesso em: 29 jun. 2025.