Rukasov VI. Best <em class="a-plus-plus">n</em>-Term Approximations in Spaces with Nonsymmetric Metric. Ukr. Mat. Zhurn. [Internet]. 2003Apr.25 [cited 2024Nov.22];55(4):500-9. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3923