Kofanov, V. A. “Sharp Remez-Type Inequalities for Differentiable Periodic Functions, Polynomials and Splines”. Ukrains’kyi Matematychnyi Zhurnal 68, no. 2 (February 25, 2016): 227–240. Accessed April 11, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/1836.