BODENCHUK, V. V.; SERDYUK, A. S. Exact Values of Kolmogorov Widths for the Classes of Analytic Functions. II. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 67, n. 8, p. 1011–1018, 2015. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2041. Acesso em: 14 apr. 2025.