%% You should probably cite rfc2917 instead of this I-D.
@techreport{muthukrishnan-mpls-corevpn-arch-03,
    number =    {draft-muthukrishnan-mpls-corevpn-arch-03},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-muthukrishnan-mpls-corevpn-arch/03/},
    author =    {Andrew G. Malis and Karthik Muthukrishnan},
    title =     {{A Core MPLS IP VPN Architecture}},
    pagetotal = 16,
    year =      2000,
    month =     jun,
    day =       22,
    abstract =  {This memo presents an approach for building core Virtual Private Network (VPN) services in a service provider's MPLS backbone. This memo provides information for the Internet community.},
}