Baring-Gould, Sabine. (1914). The Lives of the Saints, Volume 2. Edinburgh: John Grant. p. 324. "The rules he gave his monks were very strict; they abstained from all kind of meat, butter and milk; living only upon vegetables."
Grattan-Flood, William (1909). "Sts. Fintan.". In Herbermann, Charles (ed.). Catholic Encyclopedia. Vol. 6. New York: Robert Appleton Company. Retrieved 13 May 2013.