%% You should probably cite draft-xu-clad-spring-sr-service-chaining instead of this I-D.
@techreport{clad-spring-segment-routing-service-chaining-00,
    number =    {draft-clad-spring-segment-routing-service-chaining-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-clad-spring-segment-routing-service-chaining/00/},
    author =    {Francois Clad and Clarence Filsfils and Pablo Camarillo and Daniel Bernier and Bruno Decraene and Bart Peirens and Chaitanya Yadlapalli and Xiaohu Xu and Stefano Salsano and Ahmed Abdelsalam and Gaurav Dawra},
    title =     {{Segment Routing for Service Chaining}},
    pagetotal = 24,
    year =      2017,
    month =     oct,
    day =       6,
    abstract =  {This document defines data plane functionality required to implement service segments and achieve service chaining with MPLS and IPv6, as described in the Segment Routing architecture.},
}