Laurinčikas, A., and D. Šiaučiūnas. “On Zeros of Periodic Zeta Functions”. Ukrains’kyi Matematychnyi Zhurnal 65, no. 6 (June 25, 2013): 857–862. Accessed March 29, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2471.