G. A. . Kurina, “Splitting of two-point boundary problem appearing in the theory of optimal control”, Ukr. Mat. Zhurn., vol. 44, no. 5, pp. 704–709, May 1992, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/7969