%% You should probably cite rfc8003 instead of this I-D.
@techreport{ietf-hip-rfc5203-bis-01,
    number =    {draft-ietf-hip-rfc5203-bis-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-ietf-hip-rfc5203-bis/01/},
    author =    {Julien Laganier and Teemu Koponen and Lars Eggert},
    title =     {{Host Identity Protocol (HIP) Registration Extension}},
    pagetotal = 13,
    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 document specifies a registration mechanism for the Host Identity Protocol (HIP) that allows hosts to register with services, such as HIP rendezvous servers or middleboxes.},
}