1. Aleinikoff, T. Alexander, and Douglas B. Klusmeyer. 2002. Citizenship Policies for an Age of Migration. Washington, DC: Carnegie Endowment for International Peace.
2. Aristotle. 1941. The Basic Works of Aristotle (1109–1112). New York: Random House.
3. Austrian Nationality Act 1985 (FLG I 37/2006).
4. Bauböck, Rainer. 2014. ‘What Is Wrong with Selling Citizenship? It Corrupts Democracy!’ In Should Citizenship Be for Sale? edited by Ayelet Shachar and Rainer Bauböck. RSCAS EUDO Citizenship Working Paper 2014/01. Florence: EUI.
5. Bellamy, Richard. 2004. ‘The Making of Modern Citizenship’. In Lineages of European Citizenship: Rights Membership and Participation in Eleven Nation States, edited by Richard Bellamy, Dario Castiglione, and Emilio Santoro, 1–21. Houndmills, NY: Palgrave.