Textos anteriores a 2000

ASHBY, R. Requisite variety and its implications for the control of complex systems, Cybernetica 1:2, p. 83-99. (available at http://pcp.vub.ac.be/Books/AshbyReqVar.pdf, republished on the web by F. Heylighen—Principia Cybernetica Project), 1958.

BOULDING KE (1966) The Impact of the Social Sciences. New Brunswick, NJ: Rutgers University Press.

BROOME BJ and CHEN M (1992) Guidelines for computer assisted group problem-solving: Meeting the challenges of complex issues. Small Group Research 23(2): 216–236.