[1]
V. S. Romanyuk, “Approximation of classes of analytic functions by algebraic polynomials and kolmogorov widths”, Ukr. Mat. Zhurn., vol. 48, no. 2, pp. 236–250, Feb. 1996, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5351