Babenko VF, Babenko YV, Kovalenko OV. Kolmogorov’s problem about the existence of absolute monotone and multiply monotone functions with given norms of derivatives . Dopov. Nac. akad. nauk Ukr. [Internet]. 2025 Feb. 8 [cited 2026 May 10];(10):7-11. Available from: https://nasu-periodicals.org.ua/index.php/dp/article/view/15348