%% You should probably cite rfc9482 instead of this I-D.
@techreport{ietf-ace-cmpv2-coap-transport-01,
    number =    {draft-ietf-ace-cmpv2-coap-transport-01},
    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-ace-cmpv2-coap-transport/01/},
    author =    {Mohit Sahni and Saurabh Tripathi},
    title =     {{CoAP Transport for CMPV2}},
    pagetotal = 8,
    year =      2021,
    month =     apr,
    day =       23,
    abstract =  {This document specifies the use of Constrained Application Protocol (CoAP) as a transport medium for the Certificate Management Protocol (CMP). CMP defines the interaction between various PKI entities for the purpose of certificate creation and management. CoAP is an HTTP like client-server protocol used by various constrained devices in the IoT space.},
}