1. Aghniashvili, T. (2016). Towards More Effective Cooperation? The Role of States in Shaping NATO-EU Interaction and Cooperation. Connections, 15(4), 67–90.
2. Albright, M. (1998). Press conference by US secretary of state Albright. Brussels. Accessed October 25, 2018,
https://www.nato.int/docu/speech/1998/s981208x.htm
3. Bakker, A., Drent, M., & Zandee, D. (2017). European defence: How to engage the UK after Brexit?, Clingendael Report July 17. The Hague: Netherlands Institute of International Relations.
4. Barnier, M. (2017). Speech by Michel Barnier at the Berlin security conference. Press Release. Accessed October 4, 2018, from
http://europa.eu/rapid/press-release_SPEECH-17-5021_en.htm
5. Barnier, M. (2018). Speech by Michel Barnier at the EU Institute for security studies conference. Press Release. Brussels. Accessed October 15, 2018, from
http://europa.eu/rapid/press-release_SPEECH-18-3785_en.htm