Raina, R., and H. Srivastava. “Certain Results Associated With the Generalized Riemann Zeta Functions”. Rev. Téc. Fac. Ing. Univ. Zulia 18, no. 3 (1). Accessed September 26, 2025. http://www.produccioncientifica.luz.edu.ve/index.php/tecnica/article/view/5481.