1. Guibert of Nogent, Monodies, in Guibert of Nogent: Monodies and On the Relics of Saints: The Autobiography and a Manifesto of a French Monk from the Time of the Crusades, trans. Joseph McAlhany and Jay Rubenstein (London, 2011), p. 131.
2. Thomas N. Bisson, Tormented Voices: Power, Crisis, and Humanity in Rural Catalonia 1140–1200 (Cambridge, MA, 1998).
3. John D. Cotts, The Clerical Dilemma: Peter of Blois and Literate Culture in the Twelfth Century (Washington, DC, 2009), p. 211.
4. Linda Paterson, The World of the Troubadours: Medieval Occitan Society c. 1100-c.1300 (Cambridge, 1993), pp. 130–133.
5. Robert Fossier, ‘The Rural Economy and Demographic Growth’, in David Luscombe and Jonathan Riley-Smith (ed.), The New Cambridge Medieval History, vol 4.1 (Cambridge, 2004), pp. 11–46, and