Bradley, John, John Bradley, and Gerhard Untiedt. “The Macro-Economic Impacts of the European Union Structural Policy in the Convergence Regions: Methodical Notes and Empirical Results for the Period 2007–2013”. Raumforschung und Raumordnung | Spatial Research and Planning 65, no. 4 (July 31, 2007): 301–314. Accessed August 15, 2026. https://rur.oekom.de/index.php/rur/article/view/1307.