1. E. B. Haas (2001) ‘Does Constructivism Subsume Neo-Functionalism?’ in T. Christiansen, K. E. Jörgensen, and A. Wiener (eds.) The Social Construction of Europe (London: Sage), p. 22.
2. B. Rosamond (2000) Theories of European Integration (Houndmills: Palgrave), p. 50.
3. R. B. J. Walker (1993) Inside/Outside: International Relations as Political Theory (Cambridge: Cambridge University Press), p. 5.
4. C. Pentland (1973) International Theory and European Integration (New York: The Free Press), p. 132.
5. A. Niemann (2006) Explaining Decisions in the European Union (Cambridge: Cambridge University Press).