Mardvilko, Tatsiana S., and Aleksandr A. Pekarskii. “Application of the Real Hardy – Sobolev Space on the Line to Study the Order of Uniform Rational Approximations of Functions”. Journal of the Belarusian State University. Mathematics and Informatics, no. 3 (December 12, 2022): 16–36. Accessed July 18, 2026. https://journals.bsu.by/index.php/mathematics/article/view/4724.