The voyage of Máel Dúin A study in early Irish voyage literature. Followed by an ed. of Immram curaig Máele Dúin from the Yellow book of Lecan in Trinity College, Dublin - Oskamp, Hans P. A. 1936-1990 (1970)
Amsterdam, Univ., Fac.der Letteren en Wijsbegeerte, Diss. - Mit Zsfassung in niederländ.Sprache