Ferri, Delia and O'Sullivan, Charles Edward (2016) The Impact of the Economic Crisis on the Irish Legal System. Between Austerity and Constitutional Rhetoric. Federalismi.it, 26. pp. 1-29. ISSN 1826-3534
Ferri, Delia, Giannoumis, Anthony and O'Sullivan, Charles Edward (2015) Fostering accessible technology and sculpting an inclusive market through regulation. International Review of Law, Computers & Technology, 29 (2-3). pp. 81-87. ISSN 1360-0869
O'Sullivan, Charles Edward (2019) Migrant access to welfare payments in Ireland and the impact of Europeanisation: Comparing EU citizens and third-country national labour migrants. PhD thesis, National University of Ireland Maynooth.