TILEUBAYEV, T.E. Generalized Hankel shifts and exact Jackson–Stechkin inequalities in L2. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 110, n. 2, p. 142–159, 2023. DOI: 10.31489/2023m2/142-159. Disponível em: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/574. Acesso em: 10 jul. 2025.