1. Obama, B.: Memorandum for the Heads of Executive Departments and Agencies - Freedom of Information Act, http://www.whitehouse.gov/the_press_office/FreedomofInformationAct/
2. Holder, E.: Memorandum for Heads of all Federal Departments and Agencies - The Freedom of Information Act (2009), http://www.justice.gov/ag/foia-memo-march2009.pdf
3. von Lucke, J., Geiger, C.P.: Open Government Data - Frei verfügbare Daten des öffentlichen Sektors (2010), http://www.zeppelin-university.de/deutsch/lehrstuehle/ticc/TICC-101203-OpenGovernmentData-V1.pdf
4. European Parliament: DIRECTIVE 2003/98/EC of the European Parliament and of the Council on the re-use of public sector information (2003)
5. Ministers responsible for eGovernment policy of the European Union: Ministerial Declaration on eGovernment. In: 5th Ministerial eGovernment Conference. se2009.eu, Malmö, Sweden (2009)