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Systems of Reference for Evaluation of Sustainable Development: Diversity and Harmonization
Langer, Markus, (2007)
Sustainable development in Europe : concepts, evaluation and applications
Schubert, Uwe, (2007)
Langer, Markus,
Spin-off Evonik Industries : ein neues Unternehmen betritt die Bühne
Langer, Markus, (2009)