W. Harris (ed.), The Whole Works of Sir James Ware concerning Ireland. Dublin 1764, I, 589.
D. O'Corrain, 'Foreign connections and domestic politics: Killaloe and the Ui Briain in twelfth century hagiography', in (ed.) D. Whitelock et al, Ireland in Early medieval Europe. Studies in memory of Kathleen Hughes. Cambridge 1982.
E. Dunraven, Notes on Irish Architecture. London 1875-7, II, 69-71.
P. Dwyer, The History of the Diocese of Killaloe from the Reformation to the Eighteenth Century. Dublin 1878, 462-3.
A. Gwynn and D. F. Gleeson, A History of the Diocese of Killaloe. Dublin 1962.
A. Gwynn and R.N. Hadcock, Medieval Religious Houses: Ireland. London 1970, 86-87.
P. Harbison, The High Crosses of Ireland. Bonn 1992, 120-21.
F. Henry, Irish Art in the Romanesque Period (1020-1170 AD). London 1970, 135, 167.
J. Ellis and R. Moss, 'The Conservation of the Romanesque Portal at Killaloe: exposing the history of one of Clare's finest carved doorways' JRSAI, 129, (1999), 67-89.
S. Kierse, Historic Killaloe - A guide to its Antiques. Limerick 1982/3, 29.
L. De Paor, 'The Limestone Crosses of Clare and Aran', JGAHS 26 (1955/56), 58.
H.G. Leask, Irish Churches and Monastic Buildings. Dundalk 1955, I, 151-2; (1960/66),II, 54-58.
E. Owen, St Flannan's Cathedral, Killaloe: A Short History. Ballinakella 1992.
G. Petrie, The Ecclesiastical Architecture of Ireland. Dublin 1845, 274-5.
T. Garton, 'A Romanesque Doorway at Killaloe,' JBAA, 134 (1981), 31-57.
T.J. Westropp, 'Killaloe: its ancient palaces and cathedral (part II),' JRSAI 23 (1893), 187-201.
T.J. Westropp, 'Killaloe: its ancient palaces and cathedral (part I),' JRSAI 22 (1892), 398-410.
T.J. Westropp, 'The churches of County Clare,' PRIA 22 (1900), 158.