Babenko VF. BestL1-approximations of classes $W_1^r$ by Splines from $W_1^r$. Ukr. Mat. Zhurn. [Internet]. 1994Oct.25 [cited 2024Nov.24];46(10):1410–1413. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/5622