* ''The Kingship and Landscape of Tara,'' edeag. [[Edel Bhreathnach]], 2005;, {{ISBN|1-85182-954-7}}▼
* [http://forvo.com/word/airg%C3%ADalla_%28old_irish%29/ Pronunciation of Airgíalla]
▲* '' The Kingship and Landscape of Tara,'' ed. Edel Bhreathnach, 2005; {{ISBN|1-85182-954-7}}
* [https://web.archive.org/web/20061021083322/http://www.four-courts-press.ie/cgi/bookshow.cgi?file=oirialla.xml "A Hidden Ulster" by Pádraigín Ní Ullacháin], 2003, Four Courts Press 1-85182-685-8 & 1-85182-738-2.
* [https://web.archive.org/web/20070312042529/http://www.rte.ie/radio1/songsfromahiddenulster/index.html "Songs From A Hidden Ulster"], broadcast by RTÉ Radio 1 in 2006, presented by Pádraigín Ní Ullacháin.
* [https://books.google.com/books?id=c8M1p3ySwI4C&lpg=PP1&pg=PA1#v=onepage&q&f=false Early Modern Ireland]
* [http://www.mcmahonsofmonaghan.org/collas_alternate_explanation.html The Three Collas]
