SERDYUK, A.; SHIDLICH, A. Actual problems of the theory of approximations in metrics of discrete spaces on the sets of summable periodic and almost periodic functions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 76, n. 11, p. 1653–1690, 2025. DOI: 10.3842/umzh.v76i11.8525. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8525. Acesso em: 16 dec. 2025.