1. European Commission: Recommendation of 12 May 2009 on the implementation of privacy and data protection principles in applications supported by radio-frequency identification. OJ L 122/47 of 16 May 2009. http://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32009H0387&from=EN
2. European Commission: Recommendation of 9 March 2012 on preparations for the roll-out of smart metering systems. OJ L 73/9 of 13 March 2012. http://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32012H0148&from=EN
3. Article 29 Working Party: Opinion 5/2010 on the Industry Proposal for a Privacy and Data Protection Impact Assessment Framework for RFID Applications. WP 175 (2010). http://ec.europa.eu/justice/data-protection/article-29/documentation/opinion-recommendation/files/2010/wp175_en.pdf
4. Article 29 Working Party: Opinion 07/2013 on the Data Protection Impact Assessment Template for Smart Grid and Smart Metering Systems (‘DPIA Template’) prepared by Expert Group 2 of the Commission’s Smart Grid Task Force. WP 209 (2013). http://ec.europa.eu/justice/data-protection/article-29/documentation/opinion-recommendation/files/2013/wp209_en.pdf
5. Wright, D., De Hert, P. (eds.): Privacy Impact Assessment. Springer, Heidelberg (2012)