@misc{cryptoeprint:2006:040,
    author = {Mark Manulis and Ahmad-Reza Sadeghi and Joerg Schwenk},
    title = {Linkable Democratic Group Signatures},
    howpublished = {Cryptology ePrint Archive, Report 2006/040},
    year = {2006},
    url = {http://eprint.iacr.org/2006/040},
}