1. Allen, D., & Janda, K. (2006). The effect of household characteristics and energy use consciousness on the effectiveness of real-time energy use feedback: A pilot study. Proceedings of the ACEEE 2006 Summer Study on Energy Efficiency in Buildings, 1–12.
2. Bergstein, H., & Estelani, H. (2002). A survey of emerging technologies for pricing new-to-the world products. The Journal of Product and Brand Management, 11, 303–318.
3. Birzle-Harder, B.,Deffner, J., & Götz, K. (2008). Lust am Sparen oder totale Kontrolle? Akzeptanz von Stromverbrauchs-Feedback. Report. Can be ordered from URL: http://www.shop.isoe.de .
4. BMWi. (2011). Eckpunkte für ein energiepolitisches Konzept. Report of the German Federal Ministry of Economics and Technology. URL: http://www.bmwi.de/BMWi/Navigation/Energie/Energiepolitik/energiekonzept,did=405004.html (06/06/2011).
5. Bryman, A. (2001). Social research methods. New York: Oxford University Press.