CHAICHENKO, S. O. Best approximations of periodic functions in generalized lebesgue spaces. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 64, n. 9, p. 1249–1265, 2012. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2655. Acesso em: 5 dec. 2025.