1. Steinhilper, R.; Boehner, J.; Slawik, S. (2011): Resource efficiency check of small and medium sized manufacturing companies, In: Innovation in product and production: Proceedings of the 21st International Conference on Production Research ICPR21, Spath, D., Ilg, R., Krause, T. (eds.), Stuttgart, Germany, p.19
2. Lang-Koetz, C., Pastewski, N., Schimpf, S., Heubach, D. (2010): Resource efficiency as a key- driver for technology and innovation management: Dealing with an emerging trend in technology intelligence, In: International journal of technology intelligence and planning 6, No.2, pp.164-184
3. Erhardt, R., Pastewski, N. (2010): Relevanz der Ressourceneffizienz für Unternehmen des produzierenden Gewerbes, Fraunhofer-Verlag, Stuttgart
4. German Federal Ministry of Economics and Technology:
http://www.bmwi.de/BMWi/Navigation/Energie/Statistik-und-Prognosen/Energiedaten/energiepreise-energiekosten.html
, accessed 08.16. 2011
5. Fraunhofer ISI:
http://www.motor-challenge.eu
, accessed 08.16. 2011