%% You should probably cite rfc7152 instead of this I-D.
@techreport{ietf-l2vpn-etree-reqt-05,
    number =    {draft-ietf-l2vpn-etree-reqt-05},
    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/05/},
    author =    {Raymond Key and Simon DeLord and Frederic JOUNAY and Lu Huang and Zhihua Liu and Manuel Paul},
    title =     {{Requirements for Metro Ethernet Forum (MEF) Ethernet-Tree (E-Tree) Support in Layer 2 Virtual Private Network (L2VPN)}},
    pagetotal = 12,
    year =      2013,
    month =     jul,
    day =       29,
    abstract =  {This document provides functional requirements for the support of Metro Ethernet Forum (MEF) Ethernet Tree (E-Tree) in multipoint Layer 2 Virtual Private Network solutions (referred to as simply "L2VPN"). It is intended that potential solutions will use these requirements as guidelines.},
}