1. A Review of the Machinability of Copper-Base Alloys
2. Environmental Protection Agency: Safety of Public Water Systems – The Safe Drinking Water Act (SDWA), came into effect on 31.12.2002. In: Public Health Service Act, Washington, D.C.
3. Ministry of Information Industry of the People's Republic of China: Measures for Administration of the Pollution. Control of Electronic Information Products, came into effect on 01.05.2007.