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3. Glasersfeld, Ernst von (1987) Wissen, Sprache und Wirklichkeit, Vieweg, Wiesbaden.
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5. Kant, Immanuel (1787) Kritik der reinen Vernunft, Hartknoch, Riga (Russian Translation 2011).
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12. Rosenblueth, Arturo., Wiener, Norbert., Bigelow Julian (1943) Behavior, Purpose and Teleology, Philosophy of Science, Vol. 10, 1, pp. 1824.
13. Schmidt, Siegfried J. (2011) The observer story: Heinz von Foerster's heritage, Cybernetics & Human Knowing, 18, pp. 151155.
14. Spencer-Brown, George (1972) Laws of Form, The Julian Press, New York.
15. Trufanova, Elena O. (2010) Unity and Plurality of the Self, Kanon, Moscow (in Russian).
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