Charles Darwin (2010). “The Works of Charles Darwin, Volume 7: The Geology of the Voyage of the H. M. S. Beagle, Part I: Structure and Distribution of Coral Reefs”, p.3, NYU Press
"When the world feels dangerous, films showing the human experience are key, directors say". Interview with Mark Olsen and Yvonne Villarreal, www.latimes.com. January 5, 2017.