1. Affordable Housing Planning Advice Note: 2005. http://www.scotland.gov.uk/Publications/2005/03/20796/54073. Accessed: 2013-02-02. Affordable Housing Planning Advice Note: 2005. http://www.scotland.gov.uk/Publications/2005/03/20796/54073. Accessed: 2013-02-02.
2. Brisbane City - Green Living: http://www.brisbane.qld.gov.au/environment-waste/green-living/index.htm. Brisbane City - Green Living: http://www.brisbane.qld.gov.au/environment-waste/green-living/index.htm.
3. Council of the European Commission 2006. Renewed EU Sustainable Development Strategy. Council of the European Commission 2006. Renewed EU Sustainable Development Strategy .
4. Dom Helder Camara Project: http://www.projetodomhelder.gov.br/. Dom Helder Camara Project: http://www.projetodomhelder.gov.br/.