Kofanov, V. A. “On Exact Bernstein-Type Inequalities for Splines”. Ukrains’kyi Matematychnyi Zhurnal 58, no. 10 (October 25, 2006): 1357–1367. Accessed March 29, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3538.