- Author: AEuropean Union, European Union, Kaiser Wolfram, Leucht Brigitte
- Language: English
- Year: 2009
- Author: Arolda Elbasani
- Language: English
- Year: 2013
- Author: Thomas Risse
- Language: English
- Year: 2016
- Author: Nicole Scicluna
- Language: English
- Year: 2014
- Author: Nicole Scicluna
- Language: English
- Year: 2014
- Author: Cathleen Kantner
- Language: English
- Year: 2015
- Author: Rüdiger Wurzel James Connelly
- Language: English
- Year: 2010
- Author: Paul Taylor
- Language: English
- Year: 2007