1. Europaen Commission , 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 , Official Journal of the European Communities , 2000
2. Europaen Commission , Directive 2008/56/EC of the European Parliament and of the Coucil of 17 June 2008, establishing a framework for community action in the field of marine environmental policy (Marine Strategy Framework Directive) , Official Journal of the European Communities , 2008
3. OSPAR Commission , Quality Status Report 2010 , London , 2010
4. Gadolinium as a new emerging contaminant of aquatic environments
5. Towards better monitoring of technology critical elements in Europe: Coupling of natural and anthropogenic cycles