VAKARCHUK, S. B. Jackson-Type Inequalities for the Special Moduli of Continuity on the Entire Real Axis and the Exact Values of Mean $ν$ - Widths for the Classes of Functions in the Space $L_2 (ℝ)$. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 66, n. 6, p. 740–766, 2014. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2175. Acesso em: 14 apr. 2025.