%% You should probably cite draft-bestbar-lsr-spring-nrp instead of this I-D.
@techreport{bestbar-lsr-spring-sa-01,
    number =    {draft-bestbar-lsr-spring-sa-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-bestbar-lsr-spring-sa/01/},
    author =    {Tarek Saad and Vishnu Pavan Beeram and Ran Chen and Shaofu Peng and Bin Wen and Daniele Ceccarelli},
    title =     {{IGP Extensions for SR Slice Aggregate SIDs}},
    pagetotal = 12,
    year =      2021,
    month =     sep,
    day =       16,
    abstract =  {Segment Routing (SR) defines a set of topological "segments" within an IGP topology to enable steering over a specific SR path. These segments are advertised by the link-state routing protocols (IS-IS and OSPF). This document describes extensions to the IS-IS that enable advertising Slice Aggregate SR segments that share the same IGP computed forwarding path but offer a forwarding treatment (e.g. scheduling and drop policy) that is associated with a specific Slice Aggregate.},
}