[1]
L. I. Karandzhulov, “Multipoint boundary-value problems with pulse effects”, Ukr. Mat. Zhurn., vol. 47, no. 6, pp. 770–774, Jun. 1995, Accessed: Apr. 13, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5470