%% You should probably cite rfc3492 instead of this I-D.
@techreport{ietf-idn-punycode-02,
    number =    {draft-ietf-idn-punycode-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-idn-punycode/02/},
    author =    {Adam M. Costello},
    title =     {{Punycode: A Bootstring encoding of Unicode for Internationalized Domain Names in Applications (IDNA)}},
    pagetotal = 35,
    year =      2002,
    month =     may,
    day =       23,
    abstract =  {Punycode is a simple and efficient transfer encoding syntax designed for use with Internationalized Domain Names in Applications (IDNA). It uniquely and reversibly transforms a Unicode string into an ASCII string. ASCII characters in the Unicode string are represented literally, and non-ASCII characters are represented by ASCII characters that are allowed in host name labels (letters, digits, and hyphens). This document defines a general algorithm called Bootstring that allows a string of basic code points to uniquely represent any string of code points drawn from a larger set. Punycode is an instance of Bootstring that uses particular parameter values specified by this document, appropriate for IDNA. {[}STANDARDS-TRACK{]}},
}