%% You should probably cite rfc6903 instead of this I-D.
@techreport{snell-additional-link-relations-01,
    number =    {draft-snell-additional-link-relations-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-snell-additional-link-relations/01/},
    author =    {James M. Snell},
    title =     {{Additional Link Relation Types}},
    pagetotal = 6,
    year =      ** No value found for 'doc.pub_date.year' **,
    month =     ** No value found for 'doc.pub_date' **,
    day =       ** No value found for 'doc.pub_date.day' **,
    abstract =  {This specification defines a number of additional Link Relation Types.},
}