Luhmann - The Autopoiesis of Social Systems

Schoemaker, Sidney (1968) 'Self-Reference and Self-Awareness', Journal of Philosophy, 65:555-67.

Spencer Brown, George (1971) Laws of Form (2nd ed.). London: Allen & Unwin.

Stebbins, G. Ledyard (1982) Darwin to DNA, Molecules to Humanity. San Francisco: Freeman.

Varela, Francisco J. (1979) Principles of Biological Autonomy. New York: North Holland. von Foerster, Heinz (1981) Observing Systems. Seaside, CA.: Intersystems Publications.

Wilden, Antony (1972) System and Structure: Essays in Communication and Exchange. London: Tavistock Press.

Yates, Frances A. (1966) The Art of Memory. London: Routledge & Kegan Paul.