FEDUNYK-YAREMCHUK, O.V.; HEMBARS'KA, S.B.; ROMANYUK, I.A. Best $m$-term trigonometric approximations of the isotropic Nikol’skii-Besov-type classes of periodic functions of several variables. Carpathian Mathematical Publications, [S. l.], v. 17, n. 1, p. 67–81, 2025. DOI: 10.15330/cmp.17.1.67-81. Disponível em: https://personnel.pnu.edu.ua/index.php/cmp/article/view/9088. Acesso em: 26 apr. 2025.