ROMANYUK, A.S.; ROMANYUK, V.S.; POZHARSKA, K.V.; HEMBARS’KA, S.B. Characteristics of linear and nonlinear approximation of isotropic classes of periodic multivariate functions. Carpathian Mathematical Publications, [S. l.], v. 15, n. 1, p. 78–94, 2023. DOI: 10.15330/cmp.15.1.78-94. Disponível em: https://journals.pnu.edu.ua/index.php/cmp/article/view/6543. Acesso em: 9 may. 2024.