%% You should probably cite rfc2893 instead of this I-D.
@techreport{ietf-ngtrans-mech-06,
    number =    {draft-ietf-ngtrans-mech-06},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-ngtrans-mech/06/},
    author =    {Erik Nordmark and Robert E. Gilligan},
    title =     {{Transition Mechanisms for IPv6 Hosts and Routers}},
    pagetotal = 29,
    year =      2000,
    month =     apr,
    day =       17,
    abstract =  {This document specifies IPv4 compatibility mechanisms that can be implemented by IPv6 hosts and routers. {[}STANDARDS-TRACK{]}},
}