HE, D. Attracting Sets Of Nonlinear Difference Equations With Time-Varying Delays. JOURNAL OF ADVANCES IN MATHEMATICS, [S. l.], v. 14, n. 2, p. 7975–7982, 2018. DOI: 10.24297/jam.v14i2.7668. Disponível em: https://rajpub.com/index.php/jam/article/view/7668. Acesso em: 7 may. 2024.