Editors. "Gustavus II of Sweden resumes his Palatinate campaign". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=16038, accessed 22 May 2013.]
Gustavus II of Sweden, fighting on behalf of the Protestant cause in the Thirty Years War, continues his aggressive campaign, taking the cities of Nuremberg and Donauwörth.