1. a Federal Institute for Materials Research and Testing (BAM) , Berlin, Germany
2. b Bauhaus University of Weimar , Weimar, Germany
3. c MECSEK ÖKO Rt. , Pécs, Hungary
4. d Finnish Environment Institute (SYKE) , Helsinki, Finland
5. e University of Leeds , Leeds, United Kingdom
6. f Karslruhe University , Karslruhe, Germany