%% You should probably cite rfc2374 instead of this I-D.
@techreport{ietf-ipngwg-unicast-aggr-04,
    number =    {draft-ietf-ipngwg-unicast-aggr-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-ietf-ipngwg-unicast-aggr/04/},
    author =    {Dr. Steve E. Deering and Bob Hinden and Michael D. O'Dell},
    title =     {{An IPv6 Aggregatable Global Unicast Address Format}},
    pagetotal = 12,
    year =      1998,
    month =     apr,
    day =       7,
    abstract =  {This document defines an IPv6 aggregatable global unicast address format for use in the Internet. {[}STANDARDS-TRACK{]}},
}