1. Department of Industrial Engineering; University of Trento; Via Sommarive 9 38123 Trento Italy
2. National Interuniversity Consortium for Science and Technology of Materials (INSTM); Via G. Giusti 9 50121 Firenze Italy
3. LyondellBasell Industries-Centro Ricerche “Giulio Natta,”; P.le Donegani 12 44100 Ferrara Italy