FENG, H.; ZHANG, X. Existence of solutions for a coupled system of nonlinear fractional differential equations at resonance. Topological Methods in Nonlinear Analysis, [S. l.], v. 58, n. 2, p. 389–401, 2021. DOI: 10.12775/TMNA.2020.061. Disponível em: https://apcz.umk.pl/TMNA/article/view/36348. Acesso em: 22 jul. 2024.