Professor at Institute for Technology and Resources Management in the Tropics and Subtropics (ITT), Technische Hochschule Köln; Betzdorfer Strasse 2; 50679 Cologne, Germany.
Professor at Institute for Technology and Resources Management in the Tropics and Subtropics (ITT), Technische Hochschule Köln; Betzdorfer Strasse 2; 50679 Cologne, Germany.