Marichev, O. I., and S. L. Kalla. “Behaviour of Hypergeometric Function P F P-1 (z) in the Vicinity of Unity”. Rev. Téc. Fac. Ing. Univ. Zulia 7, no. 2 (1). Accessed December 6, 2025. https://produccioncientificaluz.org/index.php/tecnica/article/view/5123.