1. Hilty LM, Behrendt S, Binswanger M, Bruinink A, Erdmann L, Froehlich J (2005) The Precautionary Principle in the Information Society—Effects of Pervasive Computing on Health and Environment. II revised edition. Swiss Center for Technology Assessment (TA-SWISS), Bern, Switzerland (TA46e/2005), and the Scientific Technology Options Assessment at the European Parliament (STOA 125 EN)
2. Oertel B, Wölk M, Hilty LM, Köhler A (2005) Risks and opportunities of the use of RFID systems, Bundesamt für Sicherheit in der In., Bonn
3. Wilkinson S, Duffy N, Crowe M, Nolan K (2001) Waste from electrical & electronic equipment. Environmental Protection Agency, Ireland
4. The Economist, Berlin Economist Office, 56 (2005)
5. Herat S (2007) Clean 35:305