1. Human health and heavy metals exposure;Hu,2002
2. Hazards of heavy metal contamination;Järup;British Medical Bulletin,2003
3. WHO Guidelines for Drinking-water Quality, 4th edition, 2011.
4. U.S. EPA National Primary Drinking Water Regulations 2009.
5. Directive 2013/35/EU of the European Parliament and of the Council, 2013.