1. , , , , in: Nollet, L. M. L. (Ed.), Handbook of Water Analysis, Marcel Dekker, New York 2001, pp. 721-752.
2. http://www.epa.gov/safewater/mcl.html. Last updated on February 23rd, 2005.
3. http://toxics.usgs.gov/definitions/btex.html. Last modified on January 4th, 2005.
4. Directive 2000/60/EC of the European Parliament and of the Council of 23 October 2000, Official Journal of the European Communities 327, 22.12.02.
5. Decision N. 2455/2001/EC of the European Parliament and of the Council of 20 November 2001, Official Journal of the European Communities 331, 15.12.2001.