1. L.M.L. Nollet (Ed.), Handbook of Water Analysis, Marcel Dekker, New York, 2001 (Chapter 33).
2. http://www.epa.gov/safewater/consumer/mcl.pdf, 4 June 2004.
3. http://toxics.usgs.gov/definitions/btex.html, 4 June 2004.
4. Directive 2000/60/EC of the European Parliament and of the Council of 23 October 2000, Off. J. Eur. Commun. 327, 22 December 2002.
5. Decision 2455/2001/EC of the European Parliament and of the Council of 20 November 2001, Off. J. Eur. Commun. 331, 15 December 2001.