Kranz, Thorsten, et al. “Linear Cryptanalysis: Key Schedules and Tweakable Block Ciphers”.
IACR Transactions on Symmetric Cryptology
, vol. 2017, no. 1, Mar. 2017, pp. 474-05,
https://doi.org/10.13154/tosc.v2017.i1.474-505
.