Hat mitgewirkt an:
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Wir bewegen was : das Buch zu zehn Jahren Initiativkreis Ruhrgebiet ; '89 - '99
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The Ruhr : your basis for business in Europe ; [an investor's guide]
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Materials for energy technology in the 21st century : results of the Rhine-Ruhr International Materials Conference and Award 2005, Villa Hügel, Essen, Germany, October 23 - 24, 2005 ; documentation
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Kongress-Dokumentation / Internationales Forum Forschung Mensch - Verkehr - Umwelt : Essen, 16. - 18.11.1993 = Conference proceedings / International Research Forum Man - Transport - Environment