Working papers
- Balka, K, Raasch, C., Herstatt, C. (2009), How open is open source – Software and beyond, TIM-Arbeitspapier Nr. 58
- Raasch, C., Herstatt, C., Abdelkafi, N. (2008), Open Source Innovation – Characteristics and Applicability Outside the Software Industry, TIM-Working Paper Nr. 53
- Blecker, T., Abdelkafi, N., Raasch, C., (2008), Enabling and Sustaining Collaborative Innovation, TIM-Working Paper Nr. 52