Fedynyak, S.I., and P.V. Filevych. “Growth Estimates for the Maximal Term and Central Exponent of the Derivative of a Dirichlet Series”. Carpathian Mathematical Publications 12, no. 2 (August 6, 2020): 269–279. Accessed November 21, 2024. https://journals.pnu.edu.ua/index.php/cmp/article/view/4121.