1. 2009
2. Fortune Magazine online 2009 http://money.cnn.com/magazines/fortune/fortune500/2009/performers/industries/fastgrowers/index.html
3. Federal Research and Development Agenda for Net-Zero Energy, High-Performance Green Buildings 2008
4. AWCI's Construction Dimensions 2009
5. Cheng , C. Pouffary , S. Svenningsen , N. Callaway , M. The Kyoto Protocol, The Clean Development Mechanism and the Building and Construction Sector - A Report for the UNEP Sustainable Buildings and Construction Initiative 2008