@misc{cryptoeprint:2014:648,
    author = {Xi~Chen, Yazhi~Deng, Min Zhu and Longjiang~Qu},
    title = {An Equivalent Condition on the Switching Construction of Differentially $4$-uniform Permutations on $\gf_{2^{2k}}$ from the Inverse Function},
    howpublished = {Cryptology ePrint Archive, Report 2014/648},
    year = {2014},
    url = {https://eprint.iacr.org/2014/648},
}