Y. AL-Bayati, A. and Z. AL-Kawaz, R. 2011. A New Extended PR Conjugate Gradient Method for Solving Smooth Minimization Problems. IRAQI JOURNAL OF STATISTICAL SCIENCES. 11, 2 (Dec. 2011), 174–191. DOI:https://doi.org/10.33899/iqjoss.2011.027900.