1. Coconatch, http://www.coconatch.com
2. Internet tea kettle, http://www.mimamori.net/
3. Nabaztag, http://www.nabaztag.com
4. Backlund, S., Gyllenswärd, M., Gustafsson, A., Hjelm, S.I., Mazé, R., Redström, J.: STATIC! The aesthetics of energy in everyday things. In: Proc. Design Research Society Wonderground International Conference (2006)
5. Lecture Notes in Computer Science;S. Bakker,2010