KÜHNHARDT, Ludger (2009). Crises in European Integration. Challenges and Responses, 1945-2005. New York, Oxford: Berghahn Books. Asamblea. Revista parlamentaria de la Asamblea de Madrid, [S. l.], n. 26, p. 481–493, 2012. DOI: 10.59991/rvam/2012/n.26/298. Disponível em: https://revista.asambleamadrid.es/index.php/rvam/article/view/298. Acesso em: 23 oct. 2025.