Lacy 2010, p. 21–22. Lacy, Norris J., ed. (2010). The History of the Holy Grail. Lancelot-Grail: The Old French Arthurian Vulgate and Post-Vulgate in Translation. Vol. 1. Translated by Chase, Carol J. Cambridge: D.S. Brewer. ISBN9781843842248.
Lacy 2010, p. 6. Lacy, Norris J., ed. (2010). The History of the Holy Grail. Lancelot-Grail: The Old French Arthurian Vulgate and Post-Vulgate in Translation. Vol. 1. Translated by Chase, Carol J. Cambridge: D.S. Brewer. ISBN9781843842248.
Lacy 2010, p. 8. Lacy, Norris J., ed. (2010). The History of the Holy Grail. Lancelot-Grail: The Old French Arthurian Vulgate and Post-Vulgate in Translation. Vol. 1. Translated by Chase, Carol J. Cambridge: D.S. Brewer. ISBN9781843842248.
Lacy 2010, p. 14. Lacy, Norris J., ed. (2010). The History of the Holy Grail. Lancelot-Grail: The Old French Arthurian Vulgate and Post-Vulgate in Translation. Vol. 1. Translated by Chase, Carol J. Cambridge: D.S. Brewer. ISBN9781843842248.
Barber, Richard (2003). "Chivalry, Cistercianism and the Grail". A Companion to the Lancelot-Grail Cycle. Boydell & Brewer. pp. 3–12. ISBN9780859917834. JSTOR10.7722/j.ctt9qdj80.7.