%% You should probably cite rfc4201 instead of this I-D.
@techreport{ietf-mpls-bundle-06,
    number =    {draft-ietf-mpls-bundle-06},
    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-bundle/06/},
    author =    {Yakov Rekhter and Lou Berger and Kireeti Kompella},
    title =     {{Link Bundling in MPLS Traffic Engineering (TE)}},
    pagetotal = 12,
    year =      2004,
    month =     dec,
    day =       27,
    abstract =  {For the purpose of Generalized Multi-Protocol Label Switching (GMPLS) signaling, in certain cases a combination of \textless{}link identifier, label\textgreater{} is not sufficient to unambiguously identify the appropriate resource used by a Label Switched Path (LSP). Such cases are handled by using the link bundling construct, which is described in this document. This document updates the interface identification TLVs, which are defined in the GMPLS Signaling Functional Description. {[}STANDARDS-TRACK{]}},
}