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              Luhman N. "The Autopoiesis of Social Systems" in: Geyer F. and Zouwen J. (eds) SOCIOCY- BERNETIC PARADOXES. OBSERVATION, CONTROL, AND EVOLUTION OF SELF- STEERING SYSTEMS, London: Sage 1986
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              Luhmann, N. (1986). The autopoiesis of social systems. In: Geyer F and Zouwen J van der (eds) Sociocybernetic Paradoxes: Observation, Control and Evolotion of Self-Steering Systems: 171-192. London: Sage.
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              Luhmann, N.: The Autopoiesis or Social Systems. In: Geyer, F., van der Zouwen, J. (eds.): Sociocybernetic Paradoxes, London: Sage, pp. 172-192, 1986.
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              Luhmann, Niklas (1986): The autopoiesis of social systems, in Geyer, Felix and van der Zouwen, Johannes (eds.): Sociocybernetic paradoxes: observation, control and evolution of self-steering systems London: Sage, 172-92.
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