%% You should probably cite rfc7522 instead of this I-D.
@techreport{ietf-oauth-saml2-bearer-13,
    number =    {draft-ietf-oauth-saml2-bearer-13},
    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/13/},
    author =    {Brian Campbell and Chuck Mortimore},
    title =     {{SAML 2.0 Bearer Assertion Profiles for OAuth 2.0}},
    pagetotal = 17,
    year =      2012,
    month =     jul,
    day =       3,
    abstract =  {This specification defines the use of a SAML 2.0 Bearer Assertion as a means for requesting an OAuth 2.0 access token as well as for use as a means of client authentication.},
}