Speech before American Bar Association, New York (August 8, 1978), reported in "What They Said in 1978" by Alan F. Pater, Jason R. Pate, (p. 168), 1979.
Lucian Freud, Rolf Lauter, Jean Christophe Ammann, Craig Hartley, Museum für Moderne Kunst (Frankfurt am Main, Germany) (2001). “Lucian Freud: naked portraits : Werke der 40er bis 90er Jahre”, Hatje Cantz Publishers
Ian Hacking (2006). “The Emergence of Probability: A Philosophical Study of Early Ideas about Probability, Induction and Statistical Inference”, p.126, Cambridge University Press