Šiaučiūnas, Darius, and Algimantas Laurutis. “On the Fourth Moment of the Periodic Zeta-Function”. Lietuvos matematikos rinkinys 44, no. spec. (December 17, 2004): 110–114. Accessed May 13, 2024. https://www.journals.vu.lt/LMR/article/view/31874.