%% You should probably cite draft-ietf-rtgwg-yang-vrrp instead of this I-D.
@techreport{liu-rtgwg-yang-vrrp-04,
    number =    {draft-liu-rtgwg-yang-vrrp-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-rtgwg-yang-vrrp/04/},
    author =    {Xufeng Liu and Athanasios Kyparlis and Ravi Parikh and Acee Lindem and Mingui Zhang},
    title =     {{A YANG Data Model for Virtual Router Redundancy Protocol (VRRP)}},
    pagetotal = 30,
    year =      2016,
    month =     apr,
    day =       5,
    abstract =  {This document describes a data model for Virtual Router Redundancy Protocol (VRRP). Both version 2 and version 3 of VRRP are covered.},
}