%% You should probably cite rfc3270 instead of this I-D.
@techreport{ietf-mpls-diff-ext-09,
    number =    {draft-ietf-mpls-diff-ext-09},
    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-mpls-diff-ext/09/},
    author =    {François Le Faucheur and Dr. Juha Heinanen and Pasi J. Vaananen and Dr. Bruce S. Davie and Pierrick Cheval and Shahram Davari and Ramki Krishnan and Liwen Wu},
    title =     {{Multi-Protocol Label Switching (MPLS) Support of Differentiated Services}},
    pagetotal = 64,
    year =      2001,
    month =     apr,
    day =       27,
    abstract =  {This document defines a flexible solution for support of Differentiated Services (Diff-Serv) over Multi-Protocol Label Switching (MPLS) networks. {[}STANDARDS-TRACK{]}},
}