1. State of World Cities Report 2008/9
http://www.unhabitat.org/content.asp?cid=6040&catid=7&typeid=5
2. The Athens Charter;Corbusier,1973
3. The New Charter of Athens 2003
http://www.ceu-ectp.eu/index.php?option=com_content&view=article&id=85&Itemid=118
4. The Leipzig Charter on Sustainable European Cities
http://ec.europa.eu/regional_policy/archive/themes/urban/leipzig_charter.pdf
5. Smart City Program
http://www.smartcities.at/home-en-GB