1. Aleinikoff, A. T. (2019). Local Citizenship Needs Local Sovereignty. Retrieved from http://globalcit.eu/cities-vs-states-should-urban-citizenship-be-emancipated-from-nationality/16/ .
2. Andreozzi, D. (2016). Frantumi. Cittadinanze, diritti e spazi dall’Antico regime alla crisi globale. In D. Andreozzi & S. Tonolo (Eds.), La cittadinanza molteplice. Ipotesi e comparazioni (pp. 9–23). Trieste: EUT Edizioni Università di Trieste.
3. Arrighi, G. (1994). The Long Twentieth Century: Money, Power, and the Origins of Our Times. London: Verso.
4. Arrighi, G., & Silver, B. (1999). Chaos and Governance in the Modern World System. Minneapolis: University of Minnesota Press.
5. Aust, H. P. (2019). Urban Citizenship—A Status or a Practice? Retrieved from http://globalcit.eu/cities-vs-states-should-urban-citizenship-be-emancipated-from-nationality/19/ .