Mel'nik, V. I. “Approximate Representation for a Natural Power of the Riemann ζ-Function”. Ukrains’kyi Matematychnyi Zhurnal 50, no. 4 (April 25, 1998): 540–551. Accessed December 5, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/4924.