| 'A man of great power for a long time' : Tigernán Ua Ruairc and the Book of Kells | Casey, Denis | Article in Journal | | 2010 |
| Bréifne bias in Cogad Gáedel re Gallaib | Ní Mhaonaigh, Máire | Article in Journal | | 1992 |
| Derbforgaill: twelfth-century abductee, patron and wife | Ó Hoireabhárd, Seán | Article in Journal | | 2022 |
| In Dub-Bréifne | Moore, Eoghan | Article in Journal | | 2024 |
| Le money del Oraylly (O'Reilly's money) | Dolley, MichaelSeaby, W. A. | Article in Journal | | 1967 |
| O Ruairc of Breifne | MacDermot, Betty | Monograph or Collective Volume | Drumlin | 1990 |
| O'Rourke strongholds of west Breifne and some other chieftaincies : photographs with historic notes and maps | Anonymous | Monograph or Collective Volume | [s.n.] | 1993 |
| Sanctity and politics in Connacht c.1100 : the case of St Fursa | Ó Riain, Pádraig, 1939- | Article in Journal | | 1989 |
| Some Irish MSS with Breifne associations | De Brún, Pádraig | Article in Journal | | 1969 |
| Succession in twelfth-century Bréifne | Ó Hoireabhárd, Seán | Article in Journal | | 2023 |
| The assassination of Tigernán Ua Ruairc, the last king of Meath | Ó Hoireabhárd, Seán | Article in Journal | | 2018 |
| The Books of Knockninny : manuscripts, culture and society in early eighteenth-century Fermanagh | | Monograph or Collective Volume | Cumann Seanchais Bhréifne | 2019 |
| The Uí Briúin Bréifni genealogies and the origins of Bréifne | Ó Mórdha, Eoghan | Article in Journal | | 2002 |
| Two Breifne manuscripts | De Brún, Pádraig | Article in Journal | | 1972 |
| William Gorm de Lacy : 'chiefest champion in these parts of Europe' | Veach, Colin T.Verstraten Veach, Freya | Article in Book | | 2013 |