2020 Strategies for Enhancing EU City Diplomacy Accès Résumé Index Accèder au document 10.1007/978-3-030-45615-3_10 Since the approval of the Maastricht Treaty in 1992, cities in the European Union (EU) use different approaches to acquire and maintain visibility and... Diplomatie des villes union européenne Instruments d’action publique Gouvernance locale stratégies territoriales Notice - DOI