Giles Constable. “The Orders of Society”, chap. 3 of Three Studies in Medieval Religious and Social Thought. Cambridge–New York: Cambridge University Press, 1995, pp. 249–360.
Bernhard Jussen, ed. Ordering Medieval Society: Perspectives on Intellectual and Practical Modes of Shaping Social Relations. Trans. by Pamela Selwyn. Philadelphia: University of Pennsylvania Press, 2001.
