@misc{cryptoeprint:2008:112,
    author = {Dong Zheng and Xiangxue Li and Changshe Ma and Kefei  Chen and Jianhua Li},
    title = {Democratic Group Signatures with Threshold Traceability},
    howpublished = {Cryptology ePrint Archive, Report 2008/112},
    year = {2008},
    url = {http://eprint.iacr.org/2008/112},
}