%% You should probably cite draft-spinosa-urn-lex-21 instead of this revision.
@techreport{spinosa-urn-lex-09,
    number =    {draft-spinosa-urn-lex-09},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-spinosa-urn-lex/09/},
    author =    {PierLuigi Spinosa and Enrico Francesconi and Caterina Lupo},
    title =     {{A Uniform Resource Name (URN) Namespace for Sources of Law (LEX)}},
    pagetotal = 48,
    year =      2014,
    month =     mar,
    day =       20,
    abstract =  {This document describes a Uniform Resource Name (URN) Namespace Identification (NID) convention as prescribed by the World Wide Web Consortium (W3C) for identifying, naming, assigning, and managing persistent resources in the legal domain.},
}