Jonathan Ott, Pharmacotheon: Entheogenic Drugs, their Plant Sources and History (Kennewick, W.A.: Natural Products Co., 1993), sid. 145. Se även Dr. Albert Hofmann, LSD: My Problem Child (New York, N.Y.: McGraw-Hill Book Company, 1980), Chapter 1: "How LSD Originated," sid. 6.
A TERRIBLE MISTAKE: The Murder of Frank Olson and the CIA’s Secret Cold War Experiments ; October 2009, TrineDay Publishers, ISBN 0977795373. Review i The Telegraph, 2010-03-11