1. W. R. Ashby,An Introduction to Cybernetics, Chapman & Hall, London, 1956.
2. A. Y. Aulin-Ahmavaara,A general theory of acts, with application to the distinction between rational and irrational ‘social cognition’, Zeitschrift für allgemeine Wissenschaftstheorie VIII (1977), 195–220.
3. A. Y. Aulin-Ahmavaara,The law of requisite hierarchy, Kybernetes 8 (1979), 259–266.
4. W. A. Bocchino,Management Information Systems, Prentice-Hall, Englewood Cliffs, 1972.
5. F. Geyer,General systems theory and the growth of the individual's inner complexity as a function of time in J. Rose and C. Bilciu (Eds.),Modern Trends in Cybernetics and Systems, Springer-Verlag, Berlin, 1977.