%% You should probably cite draft-ietf-oauth-proof-of-possession instead of this I-D.
@techreport{jones-oauth-proof-of-possession-02,
    number =    {draft-jones-oauth-proof-of-possession-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-jones-oauth-proof-of-possession/02/},
    author =    {Michael B. Jones and John Bradley and Hannes Tschofenig},
    title =     {{Proof-Of-Possession Semantics for JSON Web Tokens (JWTs)}},
    pagetotal = 12,
    year =      2014,
    month =     jul,
    day =       4,
    abstract =  {This specification defines how to express a declaration in a JSON Web Token (JWT) that the presenter of the JWT possesses a particular key and that the recipient can cryptographically confirm proof-of- possession of the key by the presenter. This property is also sometimes described as the presenter being a holder-of-key.},
}