%% You should probably cite rfc9290 instead of this I-D.
@techreport{ietf-core-problem-details-08,
    number =    {draft-ietf-core-problem-details-08},
    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-problem-details/08/},
    author =    {Thomas Fossati and Carsten Bormann},
    title =     {{Concise Problem Details for Constrained Application Protocol (CoAP) APIs}},
    pagetotal = 21,
    year =      2022,
    month =     jul,
    day =       6,
    abstract =  {This document defines a concise "problem detail" as a way to carry machine-readable details of errors in a Representational State Transfer (REST) response to avoid the need to define new error response formats for REST APIs for constrained environments. The format is inspired by, but intended to be more concise than, the problem details for HTTP APIs defined in RFC 7807.},
}