MakarovV. L., MaykoN. V., and RyabichevV. L. “Realization of the Exact Three-Point Finite-Difference Schemes for the System of Second-Order Ordinary Differential Equations”. Ukrains’kyi Matematychnyi Zhurnal 75, no. 1 (February 5, 2023): 72 - 95. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/7373.