Adams*†, A. ., U. . Abubakar*‡, U. . Abubakar*, and Y. . Yakubu*. “ Symmetric-Rank One and Davidon-Fletcher-Powell Quasi-Newton Methods”. International Journal of Mathematical Analysis and Modelling, vol. 5, no. 4, Sept. 2023, https://tnsmb.org/journal/index.php/ijmam/article/view/63.