BABICH, Yu. A.; MICHAYLOVA, T. F. Approximation of periodic functions of many variables by functions of smaller number of variables in Orlicz metric spaces. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 70, n. 8, p. 1143–1148, 2018. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1624. Acesso em: 5 dec. 2025.