| Bishop Eugene of Ardmore revisited | O'Connor, Donal | Article in Journal | | 2007 |
| Bishop Malchus : his arrival in Lismore, and the Winchester saints in a Waterford Calendar | O'Connor, Donal | Article in Journal | | 2006 |
| Did Bishop Malchus of Waterford resign because of the Synod of Raithbreasail? | O'Connor, Dónal | Article in Journal | | 2012 |
| Eugenius, bishop of Ardmore and Suffragan at Lichfield (1184-5) | O'Connor, Donal | Article in Journal | | 2004 |
| Malchus (c.1047-1135), monk of Winchester and first bishop of Waterford | O'Connor, Donal | Article in Journal | | 2005 |
| The iconography of the southern lunette in Ardmore Cathedral, Co. Waterford | O'Connor, Donal | Article in Journal | | 2008 |
| The topography of Ardmore's ecclesiastical site in W.H. Brooke's drawing of the round tower (1824) | O'Connor, Dónal | Article in Journal | | 2010 |