Patseika, Pavel G., and Yauheni A. Rouba. “Fejer Means of Rational Fourier – Chebyshev Series and Approximation of Function |x|s”. Journal of the Belarusian State University. Mathematics and Informatics, no. 3 (November 27, 2019): 18–34. Accessed October 11, 2026. https://journals.bsu.by/index.php/mathematics/article/view/1053.