%% You should probably cite rfc8974 instead of this I-D.
@techreport{ietf-core-stateless-05,
    number =    {draft-ietf-core-stateless-05},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-core-stateless/05/},
    author =    {Klaus Hartke},
    title =     {{Extended Tokens and Stateless Clients in the Constrained Application Protocol (CoAP)}},
    pagetotal = 15,
    year =      2020,
    month =     mar,
    day =       12,
    abstract =  {This document provides considerations for alleviating CoAP clients and intermediaries of keeping per-request state. To facilitate this, this document additionally introduces a new, optional CoAP protocol extension for extended token lengths. This document updates RFCs 7252 and 8323.},
}