Englisch

Wilts, H. ; Bringezu, S. ; Bleischwitz, R. ; Lucas, R. ; Wittmer, D. (2011)
Challenges of metal recycling and an international covenant as possible instrument of a globally extended producer responsibility.
In: Waste management & Research, 29 (9)
Artikel, Bibliographie

Ziemann, S. ; Wittmer, D. ; Schebek, Liselotte
Hrsg.: Martens, P. N. (2010)
An empirical approach to structure the uncertainties of selected metal reserves.
In: Mineral resources and mine development. Drittes internationales Kolloquium des Instituts f
Buchkapitel, Bibliographie