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4. 2007/C97/02 Opinion of the European Economic and Social Committee on the Proposal for a Directive of the European Parliament and of the Council on Environmental Quality Standards in the Field of Water Policy and Amending Directive 2000/60/EC, Off. J. Eur. Union C97 (2007) 3.
5. Anionic surfactants in acid media: a new cloud point extraction approach for the determination of polycyclic aromatic hydrocarbons in environmental samples