%% You should probably cite draft-ietf-babel-source-specific instead of this I-D.
@techreport{boutier-babel-source-specific-03,
    number =    {draft-boutier-babel-source-specific-03},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-boutier-babel-source-specific/03/},
    author =    {Matthieu Boutier and Juliusz Chroboczek},
    title =     {{Source-Specific Routing in Babel}},
    pagetotal = 11,
    year =      2017,
    month =     jul,
    day =       3,
    abstract =  {This document describes an extension to the Babel routing protocol to support source-specific routing.},
}