Becker, P. ; Eifrig, M. ; Jeglitzka, M. ; Kilb, R. ; Opper, E. ; Stolz, H. J. ; Vestweber, C. (2000)
Interim report for the European Commission: Study on sports as a tool for the social integration of young people. - Frankfurt 2000.
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Hartmann, Herbert ; Opper, E. (2000)
Quality management of preventive and health-oriented sports programs in sports clubs.
In: CESS (Confederation Europeenne Sport Santé) Magazine. 2000, S. 3-6
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