Thurneysen, Rudolf. A Grammar of Old Irish (Fifth ed.). Dublin Institute for Advanced Studies. p. 55. Retrieved 28 October 2024.
doi.org
Nance, C., McLeod, W., O'Rourke, B. and Dunmore, S. (2016), Identity, accent aim, and motivation in second language users: New Scottish Gaelic speakers' use of phonetic variation. J Sociolinguistics, 20: 164–191. doi:10.1111/josl.12173