ディクイル
↑ Encyclopædia Britannica Vol. 7, 1970, Dicuil( p. 390 )
↑ Mario Esposito; Dicuil (1906/07). "An Unpublished Astronomical Treatise by the Irish Monk Dicuil". Proceedings of the Royal Irish Academy. Section C: Archaeology, Celtic Studies,History, Linguistics, Literature 26: 378–446.
↑ Tim Severin, The Brendan Voyage, Hutchinson & Co Ltd, 1978, p.166
↑ Paris, National Library, Lat. 4806