%% You should probably cite draft-penno-sfc-yang-15 instead of this revision.
@techreport{penno-sfc-yang-06,
    number =    {draft-penno-sfc-yang-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-penno-sfc-yang/06/},
    author =    {Reinaldo Penno and Paul Quinn},
    title =     {{Yang Data Model for Service Function Chaining}},
    pagetotal = 29,
    year =      2014,
    month =     jul,
    day =       21,
    abstract =  {This document defines a YANG data model that can be used to configure and manage Service Function Chains.},
}