@misc{cryptoeprint:2011:023,
    author = {Ming Duan and Xuajia Lai},
    title = {Improved zero-sum distinguisher for full round Keccak-f permutation},
    howpublished = {Cryptology ePrint Archive, Report 2011/023},
    year = {2011},
    url = {http://eprint.iacr.org/2011/023},
}