%% You should probably cite rfc7522 instead of this I-D.
@techreport{ietf-oauth-saml2-bearer-23,
    number =    {draft-ietf-oauth-saml2-bearer-23},
    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-oauth-saml2-bearer/23/},
    author =    {Brian Campbell and Chuck Mortimore and Michael B. Jones},
    title =     {{Security Assertion Markup Language (SAML) 2.0 Profile for OAuth 2.0 Client Authentication and Authorization Grants}},
    pagetotal = 15,
    year =      2014,
    month =     nov,
    day =       12,
    abstract =  {This specification defines the use of a Security Assertion Markup Language (SAML) 2.0 Bearer Assertion as a means for requesting an OAuth 2.0 access token as well as for client authentication.},
}