ElSayed, Eman, Abeer ElKorany, Akram salah, and Hesham Hafny. “Review Aspects of Using Social Annotation for Enhancing Search Engine Performance”. International Journal of Computer (IJC) 24, no. 1 (March 20, 2017): 177–189. Accessed April 24, 2024. https://www.ijcjournal.org/index.php/InternationalJournalOfComputer/article/view/859.