Mehdieva, G. Y., M. N. Imanova, and V. R. Ibrahimov. “An Application of the Hybrid Methods to the Numerical Solution of Ordinary Differential Equations of Second Order”. Journal of Mathematics, Mechanics and Computer Science, vol. 75, no. 4, Dec. 2012, pp. 46-54, https://bm.kaznu.kz/index.php/kaznu/article/view/158.