PolyakovO. V. (1997) “On inequalities for seminorms of certain classes of differentiable periodic functions”, Ukrains’kyi Matematychnyi Zhurnal, 49(10), pp. 1432–1435. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5141 (Accessed: 24November2024).