1. H.R. Pohl, H.G. Abadin, J.F. Risher, in: A. Sigel, H. Sigel, R.K.O. Sigel (Eds.), Neurodegenerative Diseases and Metal Ions: Metal Ions in Life Sciences, vol. 1, Wiley, Chichester, 2006, pp. 397–408 (Chapter 14)
2. 〈http://water.epa.gov/drink/contaminants/basicinformation/cadmium.cfm〉, 〈http://water.epa.gov/drink/contaminants/basicinformation/lead.cfm〉
3. Official Journal of the European Communities. Council Directive 98/83/EC of 3 November 1998 on the Quality of Water Intended for Human Consumption. L330/32. 〈http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:1998:330:0032:0054:EN:PDF〉
4. 〈http://www.boe.es/boe/dias/2003/02/21/pdfs/A07228-07245.pdf〉.
5. Determination of lead and cadmium in tap water and apple leaves after preconcentration on a new acetylacetone bonded polyurethane foam sorbent