@misc{cryptoeprint:2008:156,
    author = {Kristina Altmann and Tibor Jager and Andy Rupp},
    title = {On Black-Box Ring Extraction and Integer Factorization},
    howpublished = {Cryptology ePrint Archive, Report 2008/156},
    year = {2008},
    url = {http://eprint.iacr.org/2008/156},
}