PATSEIKA, Pavel G.; ROUBA , Yauheni A. Fejer means of rational Fourier – Chebyshev series and approximation of function |x|s. Journal of the Belarusian State University. Mathematics and Informatics, [S. l.], n. 3, p. 18–34, 2019. DOI: 10.33581/2520-6508-2019-3-18-34. Disponível em: https://journals.bsu.by/index.php/mathematics/article/view/1053. Acesso em: 18 jul. 2026.