BabenkoV. F. (1994) “BestL1-approximations of classes $W_1^r$ by Splines from $W_1^r$”, Ukrains’kyi Matematychnyi Zhurnal, 46(10), pp. 1410–1413. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5622 (Accessed: 24November2024).