Alberro, Manuel (2005). "Celtic Legacy in Galicia". E-Keltoi: Journal of Interdisciplinary Celtic Studies. 6: 1005-1035. Arkiveret fra originalen 1. juni 2013. Hentet 28. december 2015.
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Alberro, Manuel (2005). "Celtic Legacy in Galicia". E-Keltoi: Journal of Interdisciplinary Celtic Studies. 6: 1005-1035. Arkiveret fra originalen 1. juni 2013. Hentet 28. december 2015.