@misc{cryptoeprint:2010:413,
    author = {E.A.Grechnikov},
    title = {Collisions for 72-step and 73-step SHA-1: Improvements in the Method of Characteristics},
    howpublished = {Cryptology ePrint Archive, Report 2010/413},
    year = {2010},
    url = {http://eprint.iacr.org/2010/413},
}