%% You should probably cite rfc8979 instead of this I-D.
@techreport{ietf-sfc-serviceid-header-00,
    number =    {draft-ietf-sfc-serviceid-header-00},
    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-sfc-serviceid-header/00/},
    author =    {Mohamed Boucadair and Dirk Von Hugo and Behcet Sarikaya},
    title =     {{Service Function Chaining: Subscriber and Policy Identification Variable-Length Network Service Header (NSH) Context Headers}},
    pagetotal = 9,
    year =      2019,
    month =     jan,
    day =       14,
    abstract =  {This document discusses how to inform Service Functions about subscriber- and service-related information for the sake of policy enforcement and appropriate service function chaining operations.},
}