R. Housley, M. Dworkin. <a href="http://www.ietf.org/rfc/rfc5649.txt"><cite>RFC 5649: Advanced Encryption Standard (AES) Key Wrap with Padding Algorithm</cite></a>.   IETF Informational RFC, August 2009. URI:  <a href="http://www.ietf.org/rfc/rfc5649.txt"> http://www.ietf.org/rfc/rfc5649.txt</a>.