Editors. "Treaty of Karlsburg re-affirms Ferdinand's rights in Hungary and Transylvania". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14820, accessed 16 April 2014.]
Archduke Ferdinand's right to the Crown of Hungary and Transylvania is re-affirmed by the Treaty of Karlsburg (Cluj, Romania).