1. BSEE, 2001. Building services and environmental engineer, p. 16.
2. CIWMB, 2000. Designing with vision: a technical manual for materials choices in sustainable construction. California Integrated Waste Management Board.
3. ES-2002. In: Plan of implementation, earth summit 2002, Johannesburg, September 2002.
4. ISO 14040, 1997. Environmental management–life cycle assessment–principles and framework, ISO, Paris.
5. The Ecology of Building Materials;Berge,2001