Breatnach, Liam (2021) Varia Hibernica. 1. The Syntax of at-bail 'dies, perishes'. 2. ettae, 3pl. rel. of ithid 'eats'. 3. desruith, desruithithir. 4. bríath, bríad 'remnant, residue' in Bérla na filed. 5. maoi in Bérla na filed. Celtica, 33. pp. 349-372. ISSN 0069-1399
Breatnach, Liam (2020) Ríagail na Manach Líath 'The Rule of the Grey Monks': a late medieval fabrication. Celtica, 32. pp. 77-100. ISSN 0069-1399
Breatnach, Liam (2013) The Lord's share in the profits of justice and a passage in Cath Maige Tuired. Celtica, 27. pp. 1-17. ISSN 00691399
Breatnach, Liam (2020) The demonstrative pronouns in Old and Middle Irish. In: Morphosyntactic Variation in Medieval Celtic Languages. Trends in Linguistics Studies and Monographs (346). de Gruyter, Berlin, pp. 115-141. ISBN 9783110680669
Breatnach, Liam (2018) A Fragmentary Old Irish Text on Oaths. In: Fír Fesso. A Festschrift for Neil McLeod. University of Sydney, The Celtic Studies Foundation, pp. 53-64. ISBN 9781742104447
Breatnach, Liam (2018) An Old Irish Story of a Woman Poet in Donegal. In: A Reasonable Way to Proceed: Essays in Honor of Jim McCloskey. Linguistics Research Center, Santa Cruz, CA, pp. 51-57. ISBN 9781986013628
Breatnach, Liam (2017) The Trefocal Tract: An Early Middle Irish Text on Poetics. In: Dá dTrian Feasa Fiafraighidh. Essays on the Irish Grammatical and Metrical Tradition. Dublin Institute for Advanced Studies, Dublin, pp. 1-65. ISBN 9781855002357
Breatnach, Liam (2016) The Glossing of the Early Irish Law Tracts. In: Grammatica, Gramadach and Gramadeg. Vernacular Grammar and Grammarians in Medieval Ireland and Wales. John Benjamins Publishing Company, Amsterdam, pp. 113-132. ISBN 9789027246165
Breatnach, Liam (2016) On the Line-break in Early Irish Verse, and Some Remarks on the Syntax of the Genitive in Old and Middle Irish. In: Ollam. Studies in Gaelic and Related Traditions in honor of Tomás Ó Cathasaigh. Fairleigh Dickinson University Press, Madison, New Jersey, pp. 195-209. ISBN 9781611478341
Breatnach, Liam (2015) Lebor na hUidre: Some Linguistic Aspects. In: Lebor na hUidre. Codices Hibernenses Eximii 1. Royal Irish Academy, Dublin, pp. 53-77. ISBN 9781908996602
Breatnach, Liam (2015) Legal and Societal Aspects of the Poems of Blathmac. In: The Poems of Blathmac son of Cú Brettan: Reassessments. Irish Texts Society, London, pp. 104-118. ISBN 9780957566149
Breatnach, Liam (2015) Sluindfet dúib dagaisti in dána: A Middle Irish Poem on Metres. In: Aon don Éigse. Essays Marking Osborn Bergin's Centenary Lecture on Bardic Poetry (1912). Dublin Institute for Advanced Studies, pp. 51-90. ISBN 9781855002302
Breatnach, Liam (2012) Dinnseanchas Inbhear Chíochmhaine, "trí comaccomail na Góedelge", agus caibidil i stair litriú na Gaeilge. In: Féilscríbhinn do Chathal Ó Háinle. Cló Iar-Chonnacht, Indreabhán, pp. 39-55. ISBN 9781906882730
Breatnach, Liam (2011) Saint Patrick's Oath. In: Language and Power in the Celtic World. Papers from the Seventh Australian Conference of Celtic Studies. The University of Sydney, September-October 2010. University of Sydney, Centre for Celtic Studies, pp. 13-35. ISBN 9781742102344
Breatnach, Liam (2010) The King in the Old Irish Law Text Senchas Már. In: Celtic Language Law and Letters, Proceedings of the Tenth Symposium of Societas Celtologica Nordica. Meijerbergs Arkiv for Svensk Ordforskning (38). Meijerbergs Institut för Svensk Etymologisk Forskning, Göteburgs Universitet, Göteborg, pp. 107-128. ISBN 9789197474771
Breatnach, Liam (2010) Law and Literature in Early Mediaeval Ireland. In: L'Irlanda e gli Irlandesi nell'alto medioevo : Spoleto, 16-21 aprile 2009. Presso la sede della fondazione, Spoleto, pp. 215-238. ISBN 8879882341
Breatnach, Liam (2007) A Verse on Succession to Ecclesiastical Office. In: Léann Lámhscríbhinní Lobháin. The Louvain Manuscript Heritage. Éigse Publications 1, Dublin, pp. 32-41.
Breatnach, Liam (2005) Miscellanea Hibernica: 1. Old Irish tráigid (ebbs, recedes). 2. The Simplex serbaid. 3. do-maisi and a Detail of Syncope. In: A Companion in Linguistics: a Festschrift for Anders Ahlqvist on the Occasion of his Sixtieth Birthday. Stichting Uitgeverij de Keltische Draak, Nijmegen, pp. 141-151. ISBN 9080686344
Breatnach, Liam (2004) On Satire and the Poet's Circuit. In: Unity in Diversity. Studies in Irish and Scottish Gaelic Language, Literature and History. The School of Irish, Trinity College Dublin, pp. 25-35. ISBN 0954688201