1. Asmus, R. D. (2002). Opening NATO’s Door: How the Alliance Remade Itself for a New Era. New York: Columbia University Press.
2. Averre, D. (2009). From Pristina to Tskhinvali: The Legacy of Operation Allied Force in Russia’s Relations with the West. International Affairs, 85(3), 575–591.
3. Baun, M. (2004). The Implications of EU Enlargement for the United States. Perspectives, 21(Winter 2003/04), 27–38.
4. Birchfield, V. L., & Young, A. R. (Eds.). (2018). Triangular Diplomacy among the United States, the European Union and the Russian Federation: Responses to the Crisis in Ukraine. London: Palgrave Macmillan.
5. Cameron, F. (1998). Building a Common Foreign Policy: Do Institutions Matter? In J. Peterson & H. Sjursen (Eds.), A Common Foreign Policy for Europe? Competing Visions of the CFSP (pp. 59–76). London and New York: Routledge.