Th. Al-Obaidy, Eman. “Cryptanalysis Knapsack Cipher Using Artificial Immune System”. AL-Rafidain Journal of Computer Sciences and Mathematics 6, no. 2 (June 5, 2009): 185–195. Accessed December 17, 2025. https://csmj.uomosul.edu.iq/index.php/csmj/article/view/36398.