The Schmalkaldic League faces a crisis when three members - the
Electors of Trier and the Palatinate and Philip, Landgrave of Hesse
- briefly refuse to renew their membership.
Citation:
Editors. "The Schmalkaldic League loses important members".
The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14495, accessed 19 June 2013.]