K. Abbo K, Khalil, H. Mohammed F, Farah. Spectral Fletcher-Reeves Algorithm for Solving Non-Linear Unconstrained Optimization Problems. IQJOSS [Internet]. 2025 Jun. 25 [cited 2025 Aug. 5];11(1):21-38. Available from: https://rjps.uomosul.edu.iq/index.php/stats/article/view/20603