Taking advantage of Online Communities for generating Innovative Ideas Tietz, Robert Herstatt, Cornelius 2005 - TUHH Open Research - frei zugänglich
The process of user-innovation: a case study on user innovation in a consumer goods setting Tietz, Robert Morrison, Pamela D. Lüthje, Christian Herstatt, Cornelius 2004 - TUHH Open Research - frei zugänglich