Existence and Uniqueness of Solutions for the System of First-order Nonlinear Differential Equations with Three-point and Integral Boundary Conditions. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 12, n. 3, p. 756–770, 2019. DOI: 10.29020/nybg.ejpam.v12i3.3433. Disponível em: https://ejpam.com/index.php/ejpam/article/view/3433.. Acesso em: 4 may. 2024.