BigunYa. I., and FilipchukM. P. “Numerical-Analytic Method for the Investigation of Multipoint Boundary-Value Problems for Systems of Differential Equations With Transformed Argument”. Ukrains’kyi Matematychnyi Zhurnal 50, no. 11 (November 25, 1998): 1581–1584. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4815.