ROMANYUK, A. S. On Estimates of the Kolmogorov Widths of the Classes $B_{p,θ}^r$ in the Space $L_q$. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 53, n. 7, p. 996–1001, 2001. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4320. Acesso em: 5 dec. 2025.