Richard Baxter, John Wesley (1848). “The Saints' Everlasting Rest; Or, A Treatise of the Blessed State of the Saints in Their Enjoyment of God in Glory”, p.61
Aristophanes, John Hookham Frere (1839). “The Birds: Intended to Convey Some Notion of Its Effect as an Acted Play, and to Illustrate Certain Points of Dramatic Humour and Character Discoverable in the Original”, p.38
"Alfonso Cuarón, director of “Y tu mamá también” searches for hope in “Children of Men”". Interview with Mark Rahner, www.seattletimes.com. December 22, 2006.