1. GITT – Centre on Innovation Management and Technology Transfer , University of Bergamo , Via S. Bernardino 72e , Bergamo 24122 , Italy
2. Department of Management, Information and Production Engineering , University of Bergamo , Viale Marconi 5 , Dalmine 24044 , Italy
3. Machine Designer , Via Lagrange 26 , Novara 28100 , Italy