Abbas Yakubu, Usman, Mustafa Mamat, Mohamad Afendee Mohamed, Puspa Liza Ghazali, and Mohd Rivaie. 2018. “Secant Condition Free of a Spectral Hestenses-Stiefel (SHS) Conjugate Gradient Method and Its Sufficient Descent Properties”. International Journal of Engineering & Technology 7 (3.28): 312-15. https://doi.org/10.14419/ijet.v7i3.28.23467.