Editors. "Peace negotiations opened between Spain and her enemies". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15550, accessed 21 May 2013.]
Peace negotiations are opened between Spain and the United Provinces at Bergen op Zoom. At the same time, equivalent negotiations open between Spain and England at Boulogne.