オガム文字
↑ Forsyth, K.; "Abstract: The Three Writing Systems of the Picts." in Black et al. Celtic Connections: Proceedings of the Tenth International Congress of Celtic Studies, Vol. 1. East Linton: Tuckwell Press (1999), p. 508
↑ Richard A V Cox, The Language of the Ogam Inscriptions of Scotland, Dept. of Celtic, Aberdeen University ISBN 0-9523911-3-9
↑ Ó Murchú, Máirtín(1985), The Irish Language(Government of Ireland, The Department of foreign Affairs and Bord na Gaeilge, Dublin), p.12
↑ Macalister(1937), p.19