Litvin EG, Polyakov OV. Asymmetric approximations in the space $L_{p(t)}$. Ukr. Mat. Zhurn. [Internet]. 1999 Jul. 25 [cited 2025 Apr. 24];51(7):952-9. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/4684