[1]
V. G. Doronin and A. A. Ligun, “Exact constants in inequalities of the jackson type for quadrature formulas”, Ukr. Mat. Zhurn., vol. 52, no. 1, pp. 46–51, Jan. 2000, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4395