Mardanov, M., Sharifov, Y., Ismayilova, K., & Zamanova, S. (2019). 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, 12(3), 756–770. https://doi.org/10.29020/nybg.ejpam.v12i3.3433