1. Adonino P (1985) A People’s Europa. Report from the ad hoc Committee. Bulletin of the European Communities, Supplement 7/85
2. Arbesmann R (1954) The Idea of Rome in the Sermons of St. Augustine. Augustiniana, 4:305–324
3. Augustine (1997) The Confessions. New City Press, New York
4. Augustinus (2011) De stad van God. Ambo, Amsterdam
5. Bierbach J B (2017) Frontiers of Equality in the Development of EU and US Citizenship. T.M.C. Asser Press, The Hague