Editors. "Rising in Transylvania on behalf of the Archduke Ferdinand". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14822, accessed 22 May 2013.]
Transylvania sees a popular rising on behalf of the Archduke Ferdinand. The rebels protest against the current monarchs John Sigismund and Isabella, the son and widow of John Zapolya, and the powerful role in government of Cardinal Martinuzzi.