Babenko VF, Kofanov VA, Pichugov SA. Approximation of sine-shaped functions by constants in the spaces $L_p,\; p < 1$. Ukr. Mat. Zhurn. [Internet]. 2004Jun.25 [cited 2024Sep.1];56(6):745–762. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3795