AFROUZI, G. A.; SHAKERI, S.; ZAHMATKESH, H. Existence results for a class of Kirchhoff-type systems with combined nonlinear effects. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 71, n. 4, p. 571–580, 2019. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1458. Acesso em: 5 dec. 2025.