%% You should probably cite draft-ietf-core-http-mapping instead of this I-D.
@techreport{castellani-core-http-mapping-06,
    number =    {draft-castellani-core-http-mapping-06},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-castellani-core-http-mapping/06/},
    author =    {Angelo P. Castellani and Salvatore Loreto and Akbar Rahman and Thomas Fossati and Esko Dijk},
    title =     {{Best Practices for HTTP-CoAP Mapping Implementation}},
    pagetotal = 18,
    year =      2012,
    month =     oct,
    day =       22,
    abstract =  {This draft provides reference information for HTTP-CoAP proxy implementors focusing primarily on the reverse proxy case. It details deployment options, discusses possible approaches for URI mapping, and provides useful considerations related to protocol translation.},
}