1. ISO 14001: environmental management systems – specification with guidance for use;International Standard Organization,2004
2. Restriction of the use of certain hazardous substances in electrical and electronic equipment – European Union Directive 2002/95/EC; 27 January 2003.
3. TL 9000: quality system requirements;Quality Excellence For Suppliers of Telecommunications Leadership Forum (QuEST),1999
4. ISO 14062: environmental management – integrating environmental aspects into product design and development;International Standard Organization,2002
5. Application of the sustainability target method: supply line case studies;Dickinson,2002