%% You should probably cite draft-ietf-bier-php instead of this I-D.
@techreport{zzhang-bier-php-01,
    number =    {draft-zzhang-bier-php-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-zzhang-bier-php/01/},
    author =    {Zhaohui (Jeffrey) Zhang},
    title =     {{BIER Penultimate Hop Popping}},
    pagetotal = 7,
    year =      2018,
    month =     aug,
    day =       3,
    abstract =  {Bit Index Explicit Replication (BIER) can be used as provider tunnel for MVPN/GTM {[}RFC6514{]} {[}RFC7716{]} or EVPN BUM {[}RFC7432{]}. It is possible that not all routers in the provider network support BIER and there are various methods to handle BIER incapable transit routers. However the MVPN/EVPN PEs are assumed to be BIER capable - they are BFIRs/BFERs. This document specifies a method to allow BIER incapable routers to act as MVPN/EVPN PEs with BIER as the transport, by having the upstream BFR (connected directly or indirectly via a tunnel) of a PE remove the BIER header and send the payload to the PE.},
}