Roman’kov, V.A. “A Polynomial Algorithm for the Braid Double Shielded Public Key Cryptosystems”. Bulletin of the Karaganda University. Mathematics Series 84, no. 4 (December 30, 2016): 110–115. Accessed August 23, 2025. http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/133.