%% You should probably cite draft-cai-softwire-6rd-mib-05 instead of this revision.
@techreport{cai-softwire-6rd-mib-04,
    number =    {draft-cai-softwire-6rd-mib-04},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-cai-softwire-6rd-mib/04/},
    author =    {Lei Cai and Jacni Qin and Shishio Tsuchiya},
    title =     {{Definitions of Managed Objects for 6rd}},
    pagetotal = 9,
    year =      2013,
    month =     feb,
    day =       7,
    abstract =  {This document defines a portion of the Management Information Base (MIB) for use with network management protocols. In particular, it defines objects for managing 6rd devices.},
}