%% You should probably cite draft-ietf-spring-sr-yang instead of this I-D.
@techreport{litkowski-spring-sr-yang-00,
    number =    {draft-litkowski-spring-sr-yang-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-litkowski-spring-sr-yang/00/},
    author =    {Stephane Litkowski and Acee Lindem and Ing-Wher (Helen) Chen},
    title =     {{YANG Data Model for Segment Routing}},
    pagetotal = 21,
    year =      2015,
    month =     mar,
    day =       5,
    abstract =  {This document defines a YANG data model for segment routing configuration and operation. This YANG model is intended to be used on network elements to configure or operate segment routing.},
}