%% You should probably cite draft-ietf-enum-combined instead of this I-D.
@techreport{haberler-carrier-enum-03,
    number =    {draft-haberler-carrier-enum-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-haberler-carrier-enum/03/},
    author =    {Michael Haberler and Richard Stastny},
    title =     {{Combined User and Infrastructure ENUM in the e164.arpa tree}},
    pagetotal = 11,
    year =      2006,
    month =     jun,
    day =       23,
    abstract =  {This memo defines an interim solution for Infrastructure ENUM to allow a combined User and Infrastructure ENUM implementation in e164.arpa as a national choice until the long-term solution is approved. This interim solution will be deprecated after deployment of the long-term solution.},
}