Mella, Silvia, Joan Daemen, and Gilles Van Assche. 2017. “New Techniques for Trail Bounds and Application to Differential Trails in Keccak”.
IACR Transactions on Symmetric Cryptology
2017 (1): 329-57.
https://doi.org/10.13154/tosc.v2017.i1.329-357
.