Editors. "Duke Albert of Bavaria joins the Swabian League". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=13906, accessed 19 May 2013.]
Duke Albert of Bavaria joins the Swabian League. This was a league of imperial cities, principalities and knights focused on keeping peace within the Holy Roman Empire, founded in 1488 at the Reichstag of Esslingen.