^Annette Kehnel, Clonmacnois the Church and Lands of St. Ciarán:Change and Continuity in an Irish Monastic Foundation (6th- to 16th Century), 1995, Transaction Publishers, Rutgers – State University, USA. ISBN3-8258-3442-5
^"Fasti Ecclesiae Hibernicae: The succession of the prelates Volume 4" Cotton, H. p205 Dublin, Hodges & Smith, 1848-1878