O'Sullivan, John (2022) Development of bioplasmonic platforms for extracellular vesicle capture and analysis. Master of Science thesis, Dublin City University.

O'Sullivan, John (2011) The Internet and professional journalism: content, practice and values in Irish online news. PhD thesis, Dublin City University.

Horgan, John, McNamara, Paul and O'Sullivan, John (2007) Irish print and broadcast media: The political, economic, journalistic and technological context. In: Horgan, John, O'Connor, Barbara and Sheehan, Helena, (eds.) Mapping Irish media: critical explorations. University College Dublin Press, Dublin, Ireland. ISBN 978-1904558835

O'Sullivan, John (2000) News distribution via the internet and other new ICT platforms. Master of Arts thesis, Dublin City University.