Patseika PG, Rouba YA, Smatrytski KA. On one rational integral operator of Fourier – Chebyshev type and approximation of Markov functions. Журнал Белорусского государственного университета. Математика. Информатика. 2020;(2):6-27. doi:10.33581/2520-6508-2020-2-6-27