%% You should probably cite draft-ietf-v6ops-ula-usage-recommendations instead of this I-D.
@techreport{liu-v6ops-ula-usage-analysis-04,
    number =    {draft-liu-v6ops-ula-usage-analysis-04},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-liu-v6ops-ula-usage-analysis/04/},
    author =    {Bing Liu and Sheng Jiang and Cameron Byrne},
    title =     {{Analysis and recommendation for the ULA usage}},
    pagetotal = 9,
    year =      2013,
    month =     jan,
    day =       15,
    abstract =  {This document describes use cases where ULA address may be beneficially used.},
}