%% You should probably cite rfc7152 instead of this I-D.
@techreport{ietf-l2vpn-etree-reqt-03,
    number =    {draft-ietf-l2vpn-etree-reqt-03},
    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-l2vpn-etree-reqt/03/},
    author =    {Simon DeLord and Frederic JOUNAY and Lu Huang and Zhihua Liu and Manuel Paul and Ruediger Kunze and Nick Del Regno and Joshua Rogers},
    title =     {{Requirements for MEF E-Tree Support in L2VPN}},
    pagetotal = 14,
    year =      2012,
    month =     oct,
    day =       13,
    abstract =  {This document provides functional requirements for Metro Ethernet Forum (MEF) Ethernet Tree (E-Tree) support in multipoint L2VPN solutions (referred to as simply L2VPN). It is intended that potential solutions will use these requirements as guidelines.},
}