Khalil K. Abbo, and Hisham M. Khudhur. “New A Hybrid Hestenes-Stiefel and Dai-Yuan Conjugate Gradient Algorithms for Unconstrained Optimization”. Tikrit Journal of Pure Science, vol. 21, no. 1, Feb. 2023, pp. 118-23, doi:10.25130/tjps.v21i1.961.