Existence and Uniqueness of Solutions for the System of First-order Nonlinear Differential Equations with Three-point and Integral Boundary Conditions. Eur. J. Pure Appl. Math. [Internet]. 2019 Jul. 25 [cited 2024 Apr. 27];12(3):756-70. Available from: https://www.ejpam.com/index.php/ejpam/article/view/3433