Walter F. Buckley (1922–2006) American sociologist
Source: Sociology and modern systems theory (1967), p. 56.
Source: Sociology and modern systems theory (1967), p. 40 as cited in: Jacquie L'Etang, Magda Pieczka (2006) Public Relations: Critical Debates and Contemporary Practice. p. 335.
Walter F. Buckley (1922–2006) American sociologist
Source: Sociology and modern systems theory (1967), p. 56.
Ilya Prigogine (1917–2003) physical chemist
Ilya Prigogine (1996) "The End of Certainty: Time, Chaos, and the New Laws of Nature". p. 64. Cited in: Ilya Prigogine http://www.eoht.info/page/Ilya+Prigogine at echt info. By Sadi-Carnot et all., Jan 28 2013.
Wallace Brett Donham (1877–1954) American academic
Source: "The Failure of Business Leadership and the Responsibility of the Universities", 1933, p. 423; as cited in: Wallace Donham http://www.eoht.info/page/Wallace+Donham at Hmolpedia, 2015
Ludwig von Bertalanffy (1901–1972) austrian biologist and philosopher
Source: General System Theory (1968), 8. The System Concept in the Sciences of man, p. 191
W. Ross Ashby (1903–1972) British psychiatrist
Source: Design for a Brain: The Origin of Adaptive Behavior (1952), p.54
William Feller (1906–1970) Croatian-American mathematician
Source: An Introduction To Probability Theory And Its Applications (Third Edition), Chapter XV, Markov Chains, p. 397.
John Maynard Keynes (1883–1946) British economist
Source: Essays In Biography (1933), Alfred Marshall, p. 223
Ludwig von Bertalanffy (1901–1972) austrian biologist and philosopher
As cited in: Debora Hammond (2005). "Philosophical and Ethical Foundations of Systems Thinking", in: tripleC 3(2): pp. 20–27.
1950s, Problems of Life (1952, 1960)
John Maynard Keynes (1883–1946) British economist
Source: How to Pay for the War (1940), Ch. 8 : Rationing Price Control and Wage Control
Paul Cilliers (1956–2011) South African philosopher
Source: Complexity and Postmodernism (1998), p. 4; as cited in Richard Andrews et al. (2012, p. 129)