[1]
V. B. Semenyuk, “Approximation of differentiable functions by polynomial splines in domains with external peaks”, Ukr. Mat. Zhurn., vol. 46, no. 9, pp. 1224–1233, Sep. 1994, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5639