[1]
V. V. Beresnevich, V. I. Bernik, P. B. Vasylyshyn, and B. I. Ptashnik, “A multipoint problem with multiple nodes for linear hyperbolic equations”, Ukr. Mat. Zhurn., vol. 51, no. 10, pp. 1311–1316, Oct. 1999, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4729