David Dunbar, Brad Reagan: Debunking 9/11 Myths, New York 2006, S. 53; Philip Mole: 9/11 Conspiracy Theories. In: Derek Soles (Hrsg.): The Essentials of Academic Writing. 2. Auflage, Houghton Mifflin, 2009, ISBN 0-547-18133-7, S. 386f.; Michael Shermer: The Believing Brain: From Ghosts and Gods to Politics and Conspiracies – How We Construct Beliefs and Reinforce Them as Truths. St. Martin’s Press, 2012, ISBN 978-1-250-00880-0, S. 215–219