@misc{cryptoeprint:2004:057,
    author = {Alex Biryukov and Christophe De Canni\`ere and Michael Quisquater},
    title = {On Multiple Linear Approximations},
    howpublished = {Cryptology ePrint Archive, Report 2004/057},
    year = {2004},
    url = {http://eprint.iacr.org/2004/057},
}