Editors. "Treaty of Bordesholm has Christian II abandon claim to Schleswig-Holstein". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14299, accessed 11 December 2013.]
In the Treaty of Bordesholm, Christian II of Denmark agrees to resign his claim to Schleswig-Holstein, granting it instead to his uncle Frederick.