%% You should probably cite draft-ietf-idr-bgp-ls-segment-routing-ext instead of this I-D.
@techreport{gredler-idr-bgp-ls-segment-routing-ext-04,
    number =    {draft-gredler-idr-bgp-ls-segment-routing-ext-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-gredler-idr-bgp-ls-segment-routing-ext/04/},
    author =    {Stefano Previdi and Peter Psenak and Clarence Filsfils and Hannes Gredler and Mach Chen and Jeff Tantsura},
    title =     {{BGP Link-State extensions for Segment Routing}},
    pagetotal = 35,
    year =      2016,
    month =     oct,
    day =       30,
    abstract =  {Segment Routing (SR) allows for a flexible definition of end-to-end paths within IGP topologies by encoding paths as sequences of topological sub-paths, called "segments". These segments are advertised by the link-state routing protocols (IS-IS, OSPF and OSPFv3). This draft defines extensions to the BGP Link-state address-family in order to carry segment information via BGP.},
}