Daemen, J., S. Hoffert, G. Van Assche, and R. Van Keer. “The Design of Xoodoo and Xoofff”. IACR Transactions on Symmetric Cryptology, Vol. 2018, no. 4, Dec. 2018, pp. 1-38, doi:10.13154/tosc.v2018.i4.1-38.