T. Alkouli, M. Mamat, M. Rivaie, and P. Liza Ghazali, “Solving a large scale nonlinear unconstrained optimization problems by using new coefficient of conjugate gradient method with exact line search direction”, IJET, vol. 7, no. 3.28, pp. 92–96, Aug. 2018, doi: 10.14419/ijet.v7i3.28.20976.