| 'Across the gaping earth blasted by hatred': Concern in Bangladesh | O'Sullivan, Kevin | Article in Journal | | 2010 |
| 'Ah Ireland, the caring nation' : foreign aid and Irish state identity during the long 1970s | O'Sullivan, Kevin | Article in Journal | | 2013 |
| 'The cause of nationality is sacred, in ... Africa as in Ireland' : Ireland and sub-Saharan Africa at the United Nations, 1960-75 | O'Sullivan, Kevin | Article in Book | | 2005 |
| Back to Biafra. On the 50th anniversary of a war that was headline news in Ireland | O'Sullivan, Kevin | Article in Journal | | 2017 |
| Between internationalism and empire : Ireland, the ‘like-minded’ group, and the search for a new international order, 1974–82 | O'Sullivan, Kevin | Article in Journal | | 2015 |
| Biafra to Lomé : the evolution of Irish government policy on official development assistance | O'Sullivan, Kevin | Article in Journal | | 2007 |
| Documents on Irish foreign policy, vol. XIII, 1965-1969 | NA | Monograph or Collective Volume | Royal Irish Academy | 2022 |
| Documents on Irish foreign policy, vol. XIV, 1969-1973 | NA | Monograph or Collective Volume | Royal Irish Academy | 2024 |
| Ireland, Africa and the end of empire : small state identity in the Cold War, 1955-75 | O'Sullivan, Kevin | Monograph or Collective Volume | Manchester UP | 2012 |
| Irish foreign policy and sub-Saharan Africa, 1955-1975 | O'Sullivan, Kevin | Thesis | | 2008 |
| Review article : Irish diplomatic history in the twenty-first century | O'Sullivan, Kevin | Article in Journal | | 2010 |
| Sheridan Le Fanu : the Purcell papers, 1838-40 | Sullivan, Kevin | Article in Journal | | 1972 |