Editors. "Emperor Ferdinand II allows Wallenstein to gather an army". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=16031, accessed 23 May 2013.]
Holy Roman Emperor Ferdinand II recalls his ex-commander, Wallenstein, calling on him to gather an army to oppose the allied forces of Saxony and Sweden.