%% You should probably cite draft-ietf-bier-te-yang instead of this I-D.
@techreport{zhang-bier-te-yang-04,
    number =    {draft-zhang-bier-te-yang-04},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-zhang-bier-te-yang/04/},
    author =    {Zheng Zhang and Cui(Linda) Wang and Ran Chen and fangwei hu and Mahesh Sivakumar and Huanan Chen},
    title =     {{BIER TE YANG module}},
    pagetotal = 13,
    year =      2017,
    month =     oct,
    day =       30,
    abstract =  {This document defines a YANG data model for BIER TE configuration and operation.},
}