%% You should probably cite rfc6927 instead of this I-D.
@techreport{levine-tld-variant-00,
    number =    {draft-levine-tld-variant-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-levine-tld-variant/00/},
    author =    {John R. Levine and Paul E. Hoffman},
    title =     {{Variant Names in Top Level Domains}},
    pagetotal = 9,
    year =      2012,
    month =     oct,
    day =       7,
    abstract =  {IDNA {[}RFC5890{]} provides a method to map a subset of names written in Unicode into the DNS. Some languages allow a particular name to be written in multiple ways that are represented differently in IDNA, known as "variants". We survey the approaches that ICANN-managed top level domains have taken to the registration and provisioning of variant names.},
}