(en) Neil Jackman, « One of Ireland's best medieval castles was the scene of a bitter showdown between two brothers », TheJournal.ie, (lire en ligne [archive du ], consulté le )
(en) Neil Jackman, « One of Ireland's best medieval castles was the scene of a bitter showdown between two brothers », TheJournal.ie, (lire en ligne [archive du ], consulté le )