Zeng, Xinhao, Lin Tan, and Hong Xu. “Improved Search of Boomerang Distinguishers for Generalized Feistel and Application to WARP”. IACR Transactions on Symmetric Cryptology 2025, no. 1 (March 7, 2025): 444–470. Accessed May 22, 2025. https://er.ceres.rub.de/index.php/ToSC/article/view/12084.