@misc{cryptoeprint:2008:428,
    author = {Mira Belenkiy and Jan Camenisch and Melissa Chase and Markulf Kohlweiss and Anna Lysyanskaya and Hovav Shacham},
    title = {Delegatable Anonymous Credentials},
    howpublished = {Cryptology ePrint Archive, Report 2008/428},
    year = {2008},
    url = {http://eprint.iacr.org/2008/428},
}