Carney, James. The earliest Bran material. In Latin Script and Letters AD 400–900. Festschrift presented to Ludwig Bieler on the occasion of his 70th birthday, ed. J.J. OMeara and Bernd Naumann. Leiden, 1976. 174-93. Reproduced in The otherworld voyage in early Irish literature. An anthology of criticism, ed. Jonathan M. Wooding. Dublin: Four Courts Press, 2000. 73–90.