Mardanov, Misir, Yagub Sharifov, Kamala Ismayilova, and Sevinc Zamanova. 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):756-70. https://doi.org/10.29020/nybg.ejpam.v12i3.3433.