%% You should probably cite draft-ietf-core-groupcomm-proxy instead of this I-D.
@techreport{tiloca-core-groupcomm-proxy-04,
    number =    {draft-tiloca-core-groupcomm-proxy-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-tiloca-core-groupcomm-proxy/04/},
    author =    {Marco Tiloca and Esko Dijk},
    title =     {{Proxy Operations for CoAP Group Communication}},
    pagetotal = 43,
    year =      ** No value found for 'doc.pub_date.year' **,
    month =     ** No value found for 'doc.pub_date' **,
    day =       ** No value found for 'doc.pub_date.day' **,
    abstract =  {This document specifies the operations performed by a forward-proxy or reverse-proxy, when using the Constrained Application Protocol (CoAP) in group communication scenarios. Such CoAP proxy processes a single request, sent by a CoAP client over unicast, and distributes the request over IP multicast to a group of CoAP servers. It then collects the individual responses from these CoAP servers and sends these responses to the CoAP client, in a way that allows the client to distinguish the responses and their origin servers through addressing information. This document updates RFC7252.},
}