Erich Poppe (2008). Of cycles and other critical matters : some issues in Medieval Irish literary history and criticism.(em inglês) Cambridge: Dept. of Anglo-Saxon, Norse and Celtic, University of Cambridge. ISBN 9780955456855
Anna G.Khalil e Gebara Khalil (2008)Celtas Clube de Autores, p. 49
Róisín ní MhearaSaint Rónán of Brittany: A Path of Penitence Recalled (em inglês) in Seanchas Ardmhacha: Journal of the Armagh Diocesan Historical Society Vol. 20, No. 1 (2004), pp. 27-39
Published by: Cumann Seanchais Ard Mhacha/Armagh Diocesan Historical Society