Kopotun, K. A., D. Leviatan, and I. A. Shevchuk. “On One Estimate of Divided Differences and Its Applications”. Ukrains’kyi Matematychnyi Zhurnal 71, no. 2 (February 25, 2019): 230–245. Accessed December 5, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/1434.