%% You should probably cite draft-ietf-oauth-saml2-bearer instead of this I-D.
@techreport{campbell-oauth-saml-01,
    number =    {draft-campbell-oauth-saml-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-campbell-oauth-saml/01/},
    author =    {Brian Campbell and Chuck Mortimore},
    title =     {{SAML 2.0 Bearer Assertion Grant Type Profile for OAuth 2.0}},
    pagetotal = 11,
    year =      2010,
    month =     dec,
    day =       13,
    abstract =  {This specification defines the use of a SAML 2.0 bearer Assertion as means for requesting an OAuth 2.0 access token.},
}