GorbaichukV. I., and PiddubnyiO. M. “On Majorants in the Hardy-Littlewood Theorem for Higher Derivatives”. Ukrains’kyi Matematychnyi Zhurnal 47, no. 11 (November 25, 1995): 1574–1576. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5549.