19White, Gary C., and Elyn Aviva. Powerful Places in Ireland. Santa Fe, NM: Pilgrims Process, 2011.
See also: Zucchelli, Christine. Stones of Adoration Sacred Stones and Mystic Megaliths of Ireland. Doughcloyne, Wilton, Cork: Collins, 2007. 24.
A thorough discussion of the Anu/Danu relationship may be read here.