1.
Vakarchuk SB. On the best approximation in the mean and overconvergence of a sequence of polynomials of the best approximation. Ukr. Mat. Zhurn. [Internet]. 2000Jan.25 [cited 2024Nov.22];52(1):35-. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/4394