VelikinV. L. and VelikinaY. V. (1996) “Widths of sets of functions of discrete variable”, Ukrains’kyi Matematychnyi Zhurnal, 48(10), pp. 1311-1320. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5216 (Accessed: 27July2024).