[1]
V. G. Doronin and A. . Ligun, “Problem of amplification of the Jackson-type inequalities ”, Ukr. Mat. Zhurn., vol. 44, no. 4, pp. 475–480, Apr. 1992, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/7888