%% You should probably cite rfc7338 instead of this I-D.
@techreport{ietf-pwe3-p2mp-pw-requirements-06,
    number =    {draft-ietf-pwe3-p2mp-pw-requirements-06},
    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-pwe3-p2mp-pw-requirements/06/},
    author =    {Frederic JOUNAY and Yuji Kamite and Giles Heron and Matthew Bocci},
    title =     {{Requirements and Framework for Point-to-Multipoint Pseudowires over MPLS PSNs}},
    pagetotal = 16,
    year =      2013,
    month =     oct,
    day =       21,
    abstract =  {This document presents a set of requirements and a framework for providing a Point-to-Multipoint Pseudowire (PW) over MPLS PSNs. The requirements identified in this document are related to architecture, signaling and maintenance aspects of Point-to-Multipoint PW operation. They are proposed as guidelines for the standardization of such mechanisms. Among other potential applications, Point-to- Multipoint PWs can be used to optimize the support of multicast layer 2 services (Virtual Private LAN Service and Virtual Private Multicast Service) as defined in the Layer 2 Virtual Private Network Working Group.},
}