1. Silent Spring;Carson,1962
2. The Environmental Agency UK. The Water Quality. Rotherham (UK)http://www.environment-agency.gov.uk/research/planning/34383.aspx
3. Quality Criteria for Water,1974
4. EEC Water Quality Objectives for Chemicals Dangerous to Aquatic Environments (List 1)
5. Directive 2000/60/EC of the European Parliament and of the Council of 23 October 2000 establishing a framework for Community action in the field of water policy;Off. J. Eur. Communities,2000