Biographical and Autobiographical View of the 20th Century in Ireland. AcademicaPress, LLC, 2003 ISBN 1-930901-76-3, ISBN 978-1-930901-76-6. Pp. 332–333
Encyclopædia Britannica (第11版). London: Cambridge University Press. 1911. F. Passow, Opuscula academica (1835) C. Bursian, Geschichte der classischen Philologie