Babenko VF, Tkachenko ME. Problem of uniqueness of an element of the best nonsymmetric <i>L</i>₁-approximation of continuous functions with values in <i>KB</i&gt; -spaces. Ukr. Mat. Zhurn. [Internet]. 2008Jul.25 [cited 2024Nov.27];60(7):867 -. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3205