1. Ashby R (1964) An introduction to cybernetics. Methuen & Co Ltd., London
2. Barrientos J, Espejo R (1973) Un modelo cibernético para la Dirección del Sector Industrial. INTEC/CORFO 4:5–18
3. Beer S (1966) Decision and control. The meaning of operational research and management cybernetics. Wiley, Chichester
4. Beer S (1972) Brain of the firm, 1st edn. Allen Lane The Penguin Press, London
5. Beer S (1979) The heart of enterprise. Wiley, Chichester