D. A. BEHI, A. ADJE, K. C. GOLI. Lower and Upper Solutions Method for Nonlinear Second-order Differential Equations Involving a Φ−Φ−Laplacian Operator. African Diaspora Journal of Mathematics ISSN: 1539-854X, Multidisciplinary UGC CARE GROUP I, [S. l.], v. 22, n. 1, p. 22–41, 2023. Disponível em: https://newjournalzone.in/index.php/ijmfsmr/article/view/44. Acesso em: 21 nov. 2024.