%% You should probably cite rfc7623 instead of this I-D.
@techreport{ietf-l2vpn-pbb-evpn-04,
    number =    {draft-ietf-l2vpn-pbb-evpn-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-ietf-l2vpn-pbb-evpn/04/},
    author =    {Ali Sajassi and Samer Salam and Sami Boutros and Dr. Nabil N. Bitar and Aldrin Isaac and Lizhong Jin},
    title =     {{PBB-EVPN}},
    pagetotal = 20,
    year =      2013,
    month =     feb,
    day =       25,
    abstract =  {This document discusses how Ethernet Provider Backbone Bridging {[}802.1ah{]} can be combined with E-VPN in order to reduce the number of BGP MAC advertisement routes by aggregating Customer/Client MAC (C- MAC) addresses via Provider Backbone MAC address (B-MAC), provide client MAC address mobility using C-MAC aggregation and B-MAC sub- netting, confine the scope of C-MAC learning to only active flows, offer per site policies and avoid C-MAC address flushing on topology changes. The combined solution is referred to as PBB-EVPN. Conventions},
}