1. P&CEC, 2002, Directive 2002/96 on Waste Electrical and Electronic Equipment (WEEE), The Parliament and the Council of the European Communities, Brussels.
2. P&CEC, 2003, Directive 2002/95 on the restriction of the use of certain hazardous substances in electrical and electronic equipment, The Parliament and the Council of the European Communities, Brussels.
3. P&CEC, 2005, Directive 2005/32 establishing a framework for the setting of ecodesign requirements for energy-using products, The Parliament and the Council of the European Communities, Brussels.
4. Impact of Life Cycle Approach and Selling of Services on Product Design;Shpitalni,2004
5. Engineering Design: A Systematic Approach;Pahl,1996