Editors. "Leopold's mercenaries devastate Upper Austria and move towards Prague". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15685, accessed 24 April 2014.]
Mercenary soldiers in the service of Archduke Leopold of Austria lay waste to vast swathes of Upper Austria and advance on Prague.