Grillo, Paolo. “«Velut Leena Rugiens». Brescia Besieged by Frederick II (July-October 1238)”. Reti Medievali Journal 8, no. 1 (December 15, 2007): Art. #6. Accessed July 1, 2025. http://www.serena.unina.it/index.php/rm/article/view/urn%3Anbn%3Ait%3Aunina-3150.