Abdulameer Naji , Ahmed, and Salwa Shakir Baawi. “Comparative Analysis on Text Watermarking Techniques: Literature Review”. Journal of Al-Qadisiyah for Computer Science and Mathematics, vol. 14, no. 4, Nov. 2023, pp. Comp Page 111-120, https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/1303.