%% You should probably cite rfc1981 instead of this I-D.
@techreport{ietf-ipngwg-pmtuv6-03,
    number =    {draft-ietf-ipngwg-pmtuv6-03},
    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-pmtuv6/03/},
    author =    {Dr. Steve E. Deering and Jack McCann and Jeffrey Mogul},
    title =     {{Path MTU Discovery for IP version 6}},
    pagetotal = 15,
    year =      1996,
    month =     may,
    day =       23,
    abstract =  {This document describes Path MTU Discovery for IP version 6. It is largely derived from RFC 1191, which describes Path MTU Discovery for IP version 4. {[}STANDARDS-TRACK{]}},
}