%% You should probably cite rfc5103 instead of this I-D.
@techreport{ietf-ipfix-biflow-05,
    number =    {draft-ietf-ipfix-biflow-05},
    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-ipfix-biflow/05/},
    author =    {Brian Trammell and Elisa Boschi},
    title =     {{Bidirectional Flow Export Using IP Flow Information Export (IPFIX)}},
    pagetotal = 24,
    year =      2007,
    month =     jun,
    day =       22,
    abstract =  {This document describes an efficient method for exporting bidirectional flow (Biflow) information using the IP Flow Information Export (IPFIX) protocol, representing each Biflow using a single Flow Record. {[}STANDARDS-TRACK{]}},
}