H. Ismail, Tahir, Ibrahim O. Hamad, and Rashad R. Haji. “On Some Nonstandard Asymptotic Approximation of Integrals and Series”. AL-Rafidain Journal of Computer Sciences and Mathematics 2, no. 2 (December 7, 2005): 33–40. Accessed December 18, 2025. https://csmj.uomosul.edu.iq/index.php/csmj/article/view/36821.