Ibrahim, Sulaiman Mohammed, Usman Abbas Yakubu, and Mustafa Mamat. 2020. “Application of Spectral Conjugate Gradient Methods for Solving Unconstrained Optimization Problems”. An International Journal of Optimization and Control: Theories & Applications (IJOCTA) 10 (2):198-205. https://doi.org/10.11121/ijocta.01.2020.00859.