JIANG, Ruiting; ZHAI, Chengbo. Positive solutions for a system of fourth-order differential equations with integral boundary conditions and two parameters. Nonlinear Analysis: Modelling and Control, [S. l.], v. 23, n. 3, p. 401–422, 2018. DOI: 10.15388/NA.2018.3.7. Disponível em: https://www.journals.vu.lt/nonlinear-analysis/article/view/13193. Acesso em: 11 apr. 2025.