1. The 1998 Aarhus Protocol on Persistent Organic Pollutants (POPs) http://www.unece.org/env/lrtap/pops_h1.htm (accessed May 30, 2007).
2. UNEP, Stockholm Convention on Persistent Organic Pollutants, United Nations Environment Program, Geneva, Switzerland, 2001, http://www.pops.int.
3. U.S. Environmental Protection Agency PBT-Profiler, http://www.pbtprofiler.net.
4. REACH Regulation (EC) No. 1907/2006, http://eur-lex.europa.eu/LexUriServ/site/en/oj/2006/l_396/l_39620061230en00010849.pdf.
5. Are there other persistent organic pollutants? A challenge for environmental chemists;Muir;Environ. Sci. Technol.,2006