%% You should probably cite draft-ietf-bess-orf-covering-prefixes instead of this I-D.
@techreport{ietf-l3vpn-orf-covering-prefixes-02,
    number =    {draft-ietf-l3vpn-orf-covering-prefixes-02},
    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-l3vpn-orf-covering-prefixes/02/},
    author =    {Huajin Jeng and Luay Jalil and Ron Bonica and Yakov Rekhter and Keyur Patel and Lucy Yong and Xiaohu Xu},
    title =     {{Covering Prefixes Outbound Route Filter for BGP-4}},
    pagetotal = 19,
    year =      2014,
    month =     sep,
    day =       23,
    abstract =  {This document defines a new ORF-type, called the "Covering Prefixes ORF (CP-ORF)". CP-ORF is applicable in Virtual Hub-and-Spoke VPNs. It also is applicable in BGP/MPLS Ethernet VPN (EVPN) Networks.},
}