Ethelreda wa Ely
Wogan-Browne, Jocelyn, "Rerouting the Dower: The Anglo-Norman Life of St. Audrey by Marie (of Chatteris?)", in Power of the Weak: Studies on Medieval Women, ed. Jennifer Carpenter and Sally-Beth Maclean (Champaign: University of Illinois Press, 1995), 27–56.