AFROUZI, G. A. A.; MIRZAPOUR, M. Existence results for a class of (p,q) Laplacian systems. Nonlinear Analysis: Modelling and Control, [S. l.], v. 15, n. 4, p. 397–403, 2010. DOI: 10.15388/NA.15.4.14311. Disponível em: https://www.journals.vu.lt/nonlinear-analysis/article/view/14311.. Acesso em: 25 jul. 2024.