1. Sustainable Development in Germanyhttps://www.destatis.de/EN/Publications/Specialized/EnvironmentalEconomicAccounting/Indicators2014.pdf?__blob=publicationFile
2. Deutsches Ressourceneffizienzprogramm (ProgRess),2012
3. Fundamental Plan for Establishing a Sound Material-Cycle Society (Tentative Translation by Ministry of the Environment)http://www.env.go.jp/en/recycle/smcs/2nd-f_plan.pdf
4. Thematic Strategy on the Sustainable Use of Natural Resources,2005
5. Communication from the Commission to the European Parliament, the Council, the European Economic and Social Committee and the Committee of the Regions. Roadmap to a Resource Efficient Europe,2011