%% You should probably cite draft-ietf-teas-yang-l3-te-topo instead of this I-D.
@techreport{liu-teas-yang-l3-te-topo-04,
    number =    {draft-liu-teas-yang-l3-te-topo-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-liu-teas-yang-l3-te-topo/04/},
    author =    {Xufeng Liu and Igor Bryskin and Vishnu Pavan Beeram and Tarek Saad and Himanshu C. Shah and Oscar Gonzalez de Dios},
    title =     {{YANG Data Model for Layer 3 TE Topologies}},
    pagetotal = 37,
    year =      2017,
    month =     jul,
    day =       3,
    abstract =  {This document defines a YANG data model for layer 3 traffic engineering topologies.},
}