V. I. Mel'nik, “Approximate representation for a natural power of the Riemann ζ-function”, Ukr. Mat. Zhurn., vol. 50, no. 4, pp. 540–551, Apr. 1998, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4924