%% You should probably cite rfc9200 instead of this I-D.
@techreport{ietf-ace-oauth-authz-02,
    number =    {draft-ietf-ace-oauth-authz-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-ietf-ace-oauth-authz/02/},
    author =    {Ludwig Seitz and Göran Selander and Erik Wahlstroem and Samuel Erdtman and Hannes Tschofenig},
    title =     {{Authentication and Authorization for Constrained Environments (ACE)}},
    pagetotal = 53,
    year =      2016,
    month =     jun,
    day =       10,
    abstract =  {This specification defines the ACE framework for authentication and authorization in Internet of Things (IoT) deployments. The ACE framework is based on a set of building blocks including OAuth 2.0 and CoAP, thus making a well-known and widely used authorization solution suitable for IoT devices. Existing specifications are used where possible, but where the limitations of IoT devices require it, profiles and extensions are provided.},
}