Gong, Xinxin, and Bin Zhang. “Comparing Large-Unit and Bitwise Linear Approximations of SNOW 2.0 and SNOW 3G and Related Attacks”. IACR Transactions on Symmetric Cryptology 2021, no. 2 (June 11, 2021): 71–103. Accessed January 18, 2025. https://er.ceres.rub.de/index.php/ToSC/article/view/8906.