%% You should probably cite rfc9128 instead of this I-D.
@techreport{ietf-pim-yang-04,
    number =    {draft-ietf-pim-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-ietf-pim-yang/04/},
    author =    {Xufeng Liu and Pete McAllister and Anish Peter and Mahesh Sivakumar and Yisong Liu and fangwei hu},
    title =     {{A YANG data model for Protocol-Independent Multicast (PIM)}},
    pagetotal = 74,
    year =      ** No value found for 'doc.pub_date.year' **,
    month =     ** No value found for 'doc.pub_date' **,
    day =       ** No value found for 'doc.pub_date.day' **,
    abstract =  {This document defines a YANG data model that can be used to configure Protocol Independent Multicast (PIM) devices.},
}