Stasyuk SA. Best $m$-term approximation of the classes $B ^{r}_{\infty, \theta}$ of functions of many variables by polynomials in the haar system. Ukr. Mat. Zhurn. [Internet]. 2011Apr.25 [cited 2024Nov.22];63(4):549-55. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/2740