R., Vimalathithan, and M. L. Valarmathi. “Cryptanalysis of Simplified-AES Using Particle Swarm Optimisation”. Defence Science Journal 62, no. 2 (March 13, 2012): 117–121. Accessed June 16, 2025. https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/778.