%% You should probably cite draft-ietf-idr-te-pm-bgp instead of this I-D.
@techreport{previdi-idr-bgpls-te-metric-extensions-01,
    number =    {draft-previdi-idr-bgpls-te-metric-extensions-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-previdi-idr-bgpls-te-metric-extensions/01/},
    author =    {Stefano Previdi and Qin Wu and Hannes Gredler and Saikat Ray and Jeff Tantsura and Clarence Filsfils and Les Ginsberg},
    title =     {{BGP-LS Traffic Engineering (TE) Metric Extensions}},
    pagetotal = 9,
    year =      2016,
    month =     mar,
    day =       1,
    abstract =  {This document defines new BGP-LS TLVs in order to carry the IGP Traffic Engineering Extensions defined in IS-IS and OSPF protocols.},
}