Mikityuk, L. Y., and M. M. Sheremeta. “On the Asymptotic Behavior of the Remainder of a Dirichlet Series Absolutely Convergent in a Half-Plane”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 55, no. 3, Mar. 2003, pp. 379-88, https://umj.imath.kiev.ua/index.php/umj/article/view/3912.