%% You should probably cite rfc3188 instead of this I-D.
@techreport{hakala-nbn-01,
    number =    {draft-hakala-nbn-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-hakala-nbn/01/},
    author =    {Juna Hakala},
    title =     {{Using National Bibliography Numbers as Uniform Resource Names}},
    pagetotal = 13,
    year =      2001,
    month =     jan,
    day =       30,
    abstract =  {This document discusses how national bibliography numbers (persistent and unique identifiers assigned by the national libraries) can be supported within the URN (Uniform Resource Names) framework and the syntax for URNs defined in RFC 2141. Much of the discussion is based on the ideas expressed in RFC 2288. This memo provides information for the Internet community.},
}