%% You should probably cite rfc2766 instead of this I-D.
@techreport{ietf-ngtrans-natpt-07,
    number =    {draft-ietf-ngtrans-natpt-07},
    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-natpt/07/},
    author =    {Pyda Srisuresh and George Tsirtsis},
    title =     {{Network Address Translation - Protocol Translation (NAT-PT)}},
    pagetotal = 21,
    year =      1999,
    month =     oct,
    day =       26,
    abstract =  {This document specifies an IPv4-to-IPv6 transition mechanism, in addition to those already specified. {[}STANDARDS-TRACK{]}},
}