BITIMKHAN, S. Absolute summability of Fourier series of function from Besov’s classes. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 83, n. 3, p. 28–31, 2016. Disponível em: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/97. Acesso em: 10 jul. 2025.