VAKARCHUK, S. B. Widths of classes of functions in the weight space $L_{2,\gamma}(\mathbb{R}), \gamma=\exp(-x^2)$. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 74, n. 5, p. 610–619, 2022. DOI: 10.37863/umzh.v74i5.7147. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7147. Acesso em: 8 dec. 2025.