- BIELER L., The Irish Penitentials, Dublin 1963, 161-163.
- MCNEILL J.T. - GAMER H.M., Medieval handbooks of penance: a translation of the principal “libri poenitentiales” and selections from related documents, New York 1938, 131-134.
- Ó NÉILL P.P. – DUMVILLE D. N., Cáin Adomnáin and Canones Adomnani, Cambridge 2003.