VarbanetsP. D. and KirbatS. A. (2011) “On the mean value of the function $\overline{S}_k(n)$”, Ukrains’kyi Matematychnyi Zhurnal, 63(4), pp. 448-458. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/2730 (Accessed: 24November2024).