1. Annual Energy Review, DOE/EIA – 0384;Energy Information Administration (EIA),2010
2. A Green Source Book;Yudelson,2010
3. United Nations Environment Program, Buildings Can Play Key Role in Combating Climate Change,2007
4. Green Building Retrofit and Renovation: Rapidly Expanding Market Opportunities through Existing Buildings, Smart Market Report;Bernstein,2009
5. Globalization and global trends in green real estate investment;Nelson;Real Estate Research (RREEF),2008