%% You should probably cite draft-ietf-teas-yang-te-mpls-topology instead of this I-D.
@techreport{busizheng-teas-yang-te-mpls-topology-01,
    number =    {draft-busizheng-teas-yang-te-mpls-topology-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-busizheng-teas-yang-te-mpls-topology/01/},
    author =    {Italo Busi and Haomian Zheng and Aihua Guo and Xufeng Liu},
    title =     {{A YANG Data Model for MPLS-TE Topology}},
    pagetotal = 13,
    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 describes a YANG data model for Multi-Protocol Label Switching (MPLS) with Traffic Engineering (MPLS-TE) networks.},
}