%% You should probably cite rfc5543 instead of this I-D.
@techreport{ietf-softwire-bgp-te-attribute-04,
    number =    {draft-ietf-softwire-bgp-te-attribute-04},
    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-softwire-bgp-te-attribute/04/},
    author =    {Yakov Rekhter and Hamid H. Ould-Brahim and Don Fedyk},
    title =     {{BGP Traffic Engineering Attribute}},
    pagetotal = 6,
    year =      2008,
    month =     dec,
    day =       22,
    abstract =  {This document defines a new BGP attribute, the Traffic Engineering attribute, that enables BGP to carry Traffic Engineering information. The scope and applicability of this attribute currently excludes its use for non-VPN reachability information. {[}STANDARDS-TRACK{]}},
}