1. User representations: practices, methods and sociology;Akrich,1995
2. Car-Sharing: Nachhaltige Mobilität durch eigentumslose Pkw-Nutzung?;Behrendt,2000
3. On the nature, function, and composition of technological systems;Carlsson;Journal of Evolutionary Economics,1991
4. Mobility Concepts: Car2go;Daimler,2012
5. Renewable Energy in the Danish Energy System: From Small Experiments to Full Scale Energy Plants. The Danish National Report of the Express Path Project;Danielsen,1995