K. Abbo, Khalil, Khalil, Farah H. Mohammed, and Farah. “Spectral Fletcher-Reeves Algorithm for Solving Non-Linear Unconstrained Optimization Problems”. IRAQI JOURNAL OF STATISTICAL SCIENCES 11, no. 1 (June 25, 2025): 21–38. Accessed August 5, 2025. https://rjps.uomosul.edu.iq/index.php/stats/article/view/20603.