[1]
B. I. Ptashnik and L. P. Sylyuha, “Multipoint problem for typeless factorized differential operators”, Ukr. Mat. Zhurn., vol. 48, no. 1, pp. 66–79, Jan. 1996, Accessed: Apr. 13, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5364