%% You should probably cite draft-ietf-ace-coap-est-oscore instead of this I-D.
@techreport{selander-ace-coap-est-oscore-02,
    number =    {draft-selander-ace-coap-est-oscore-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-selander-ace-coap-est-oscore/02/},
    author =    {Göran Selander and Shahid Raza and Martin Furuhed and Mališa Vučinić},
    title =     {{Protecting EST payloads with OSCORE}},
    pagetotal = 9,
    year =      2019,
    month =     mar,
    day =       8,
    abstract =  {This document specifies public key certificate enrollment procedures protected with application-layer security protocols suitable for Internet of Things (IoT) deployments. The protocols leverage payload formats defined in Enrolment over Secure Transport (EST) and existing IoT standards including the Constrained Application Protocol (CoAP), Concise Binary Object Representation (CBOR) and the CBOR Object Signing and Encryption (COSE) format.},
}