%% You should probably cite rfc8571 instead of this I-D.
@techreport{ietf-idr-te-pm-bgp-18,
    number =    {draft-ietf-idr-te-pm-bgp-18},
    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-idr-te-pm-bgp/18/},
    author =    {Les Ginsberg and Stefano Previdi and Qin Wu and Jeff Tantsura and Clarence Filsfils},
    title =     {{BGP - Link State (BGP-LS) Advertisement of IGP Traffic Engineering Performance Metric Extensions}},
    pagetotal = 10,
    year =      2018,
    month =     dec,
    day =       20,
    abstract =  {This document defines new BGP - Link State (BGP-LS) TLVs in order to carry the IGP Traffic Engineering Metric Extensions defined in the IS-IS and OSPF protocols.},
}