N. P. . Korneichuk, “Behaviour of derivatives of the spline-interpolation error”, Ukr. Mat. Zhurn., vol. 43, no. 1, pp. 67–72, Jan. 1991, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/9307