Ganzburg , M.I. (1991) “Limiting theorems for the best polynomial approximations in $L_\infty$ metrics”, Ukrains’kyi Matematychnyi Zhurnal, 43(3), pp. 336–342. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/9612 (Accessed: 12 January 2026).