1. P.A. Arias, in: Proc. 2nd Int. Workshop Brominated Flame Retardants, Stockholm, Sweden, 2001, pp. 17–19
2. European Parliament Report A5-0437/2002, 2002
3. European Union press release, 30 January 2001
4. B.M. Gawlik, G. Bidoglio, Evaluation of the relevance of organic micro-pollutants in sewage sludge, Provisional report for Commenting, Results of a JRC-Co-ordinated survey on background values, [EUR 20???] EN, Office for Official Publications of the European Communities, Luxembourg, 2004
5. International Standards Organisation, ISO 5667-13:1997, Water quality – Sampling – Part 13: Guidance on sampling of sludges from sewage and water-treatment works, ISO, Geneva, Switzerland, 1997