%% You should probably cite draft-ietf-core-coap-pubsub instead of this I-D.
@techreport{koster-core-coap-pubsub-00,
    number =    {draft-koster-core-coap-pubsub-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-koster-core-coap-pubsub/00/},
    author =    {Michael Koster and Ari Keränen and Jaime Jimenez},
    title =     {{Publish-Subscribe in the Constrained Application Protocol (CoAP)}},
    pagetotal = 15,
    year =      2014,
    month =     oct,
    day =       27,
    abstract =  {The Constrained Application Protocol, CoAP, and related extensions are intended to support machine-to-machine communication in systems where one or more nodes are resource constrained, in particular for low power wireless sensor networks. This document defines publish- subscribe and message queuing functionality for CoAP that extends the capabilities for supporting nodes with long breaks in connectivity and/or up-time.},
}