1. Augustine (1912 edition) Confessions (translated William Watts) 2 vols. Harvard: Harvard University Press.
2. Given, James B. (1997) Inquisition and Medieval Society: Power, Discipline, and Resistance in Languedoc. Ithaca: Cornell University Press.
3. Grundmann, Herbert (1976) Ausgewiihlte Aufsiitze, Teil 1: Religiose Bewegungen. Stuttgart: Anton Hiersemann.
4. Religious Movements in the Middle Ages