Maulana Malik, Mustafa Mamat, Siti Sabariah Abas, Sukono. “Convergence Analysis of a New Coefficient Conjugate Gradient Method Under Exact Line Search ”. International Journal of Advanced Science and Technology, Vol. 29, no. 05, Apr. 2020, pp. 187 -98, http://sersc.org/journals/index.php/IJAST/article/view/8849.