Political Culture in an Age of Religious Wars. shgate Publishing, Ltd. 2012. ISBN 9781409443759. Duffy, Christopher. Siege Warfare: The Fortress in the
211–212 Duffy. Siege Warfare: Fortress in the Early Modern World Los Tercios de Flandes. Giménez Martín Tracy pp.78–79 Jaques p.676 With hope of French aid