| An Irish homily on the life of the Virgin Mary | Breatnach, Caoimhín | Article in Journal | | 2000 |
| Aodh Ó Dochartaigh and UCD-OFM MS A 25. | Breatnach, Caoimhín | Article in Book | | 2010 |
| Cath Fionntrágha | Breatnach, Caoimhín | Article in Book | | 1995 |
| Early modern Irish prose | Breatnach, Caoimhín | Article in Book | | 1996 |
| Early modern Irish prose reconsidered : the case of Ceasacht Inghine Guile | Breatnach, Caoimhín | Article in Journal | | 1991 |
| Exploiting the past : Pearse as editor and interpreter of Fiannaíocht literature | Breatnach, Caoimhín | Article in Book | | 2009 |
| Foinsí an Leagain De bheatha Cholaim Chille a scríobhadh faoi stiúradh Mhaghnuis Uí Dhomhnaill | Breatnach, Caoimhín | Article in Book | | 2007 |
| Léann lamhscríbhinní Lobháin = the Louvain manuscript heritage | | Monograph or Collective Volume | National University of Ireland | 2007 |
| Lorg na leabhar: a Festschrift for Pádraig A. Breatnach | | Monograph or Collective Volume | The National University of Ireland | 2019 |
| Manuscript abbreviations and other scribal features in the Liber Flavus Fergusiorum | Breatnach, Caoimhín | Article in Journal | | 2011 |
| Patronage, politics and prose : Ceasacht Inghine Guile; Sgeala Muice Meic Dhá Thó; Oidheadh Chuinn Chéadchataigh | Breatnach, Caoimhín | Monograph or Collective Volume | An Sagart | 1996 |
| Rawlinson B. 502, Lebar Glinne dá Locha and Saltair na Rann | Breatnach, Caoimhín | Article in Journal | | 1997 |
| Some observations on an unpublished version of the Gospel of Nicodemus | Breatnach, Caoimhín | Article in Book | | 2013 |
| The Annals of Ulster: verse, sources and editions | Breatnach, Caoimhín | Article in Book | | 2015 |
| The early modern version of Scéla Mucce Meic Dathó tempus, locus, persona et causa scribendi | Breatnach, Caoimhín | Article in Journal | | 1990 |
| The historical context of Cath Fionntrágha | Breatnach, Caoimhín | Article in Journal | | 1994 |
| The historical context of Cath Fionntrágha | Breatnach, Caoimhín | Article in Journal | | 1994 |
| The murder of Shane O'Neill : Oidheadh Chuinn Chéadchathaigh | Breatnach, Caoimhín | Article in Journal | | 1992 |
| The religious significance of Oidheadh Chloinne Lir | Breatnach, Caoimhín | Article in Journal | | 1999 |
| The significance of the orthography of Irish proper names in the Codex Salmanticensis | Breatnach, Caoimhín | Article in Journal | | 2005 |
| The transmission and authorship of Rudimenta grammaticae Hibernicae | Breatnach, Caoimhín | Article in Book | | 2017 |
| The transmission and text of Tóruigheacht Dhiarmada agus Ghráinne : a re-appraisal | Breatnach, Caoimhín | Article in Book | | 2012 |
| The transmission of the earliest recension of Acallam na senórach | Breatnach, Caoimhín | Article in Book | | 2019 |