Skorokhodov, D. S. “Landau-Kolmogorov Problem for a Class of Functions Absolutely Monotone on a Finite Interval”.
Ukrains’kyi Matematychnyi Zhurnal 63, no. 4 (April 25, 2011): 531–548. Accessed April 14, 2025.
https://umj.imath.kiev.ua/index.php/umj/article/view/2739.