Sobchuk, Valentyn, Iryna Zelenska, and Oleksandr Laptiev. “Algorithm for Solution of Systems of Singularly Perturbed Differential Equations With Adifferential Turning Point”. Bulletin of the Polish Academy of Sciences Technical Sciences 71, no. 3 (April 28, 2023): e145682. Accessed September 10, 2026. https://wydawnictwo.pan.pl/index.php/bpasts/article/view/3712.