@misc{cryptoeprint:2010:282,
    author = {Kerry A. McKay and Poorvi L. Vora},
    title = {Pseudo-Linear Approximations for ARX Ciphers: With Application to Threefish},
    howpublished = {Cryptology ePrint Archive, Report 2010/282},
    year = {2010},
    url = {http://eprint.iacr.org/2010/282},
}