1. Dewey, J.: The School and Society. University of Chicago Press, Chicago, Illinois (1915)
2. Wenger, E.: Communities of practice: Learning, meaning and identity. Cambridge University Press, Cambridge UK (1999)
3. Engeström, Y.: Learning by expanding. Orienta-Konsultit, Helsinki Finland (1987)
4. Vygotsky, L.S.: Mind and Society: the Development of Higher Psychological Processes. Harvard University Press, Cambridge UK (1987)
5. Schon, D.A.: Educating the Reflective Practitioner: Toward a New Design for Teaching and Learning in the Professions. Jossey-Bass Publishers, San Francisco, CA (1987)