SOLICH, K. V. Kolmogorov widths of the classes $B^{\Omega}_{p, \theta}$ of periodic functions of many variables in the space $L_q$. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 64, n. 10, p. 1416–1425, 2012. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2668. Acesso em: 6 dec. 2025.