%% You should probably cite rfc3140 instead of this I-D.
@techreport{ietf-diffserv-2836bis-02,
    number =    {draft-ietf-diffserv-2836bis-02},
    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-diffserv-2836bis/02/},
    author =    {Brian E. Carpenter and Scott W. Brim and David L. Black and François Le Faucheur},
    title =     {{Per Hop Behavior Identification Codes}},
    pagetotal = 8,
    year =      2001,
    month =     may,
    day =       9,
    abstract =  {This document defines a 16 bit encoding mechanism for the identification of differentiated services Per Hop Behaviors in protocol messages. It replaces RFC 2836. {[}STANDARDS-TRACK{]}},
}