Beullens, W., T. Beyne, A. Udovenko, and G. Vitto. ‚ÄúCryptanalysis of the Legendre PRF and Generalizations‚ÄĚ. IACR Transactions on Symmetric Cryptology, Vol. 2020, no. 1, May 2020, pp. 313-30, doi:10.13154/tosc.v2020.i1.313-330.