1. Agency for Toxic Substances and Disease Registry , Public Health Services and US Department of Human and Health Services, Toxicological Profile for Lead, ATSDR, Atlanta, 2007
2. Accumulation of Cadmium in Crop Plants and Its Consequences to Human Health
3. H. Boiteau , A.Pineau, H. A.Mckenzie and L. E.Smythe, Quantitative Trace Analysis of Biological Materials: Principles and Methods for Determination of Trace Elements and Trace Amounts of Some Macroelements, Elsevier Science Publishers, New York, 1988, pp. 543–551
4. Council Directive of 27 July 1976 on the approximation of the laws of the Member States relating to cosmetic products (76/768/EEC). OJL 262, 27.9.1976, p.169. http://europa.eu
5. Heavy metals in powder-based cosmetics quantified by ICP-MS: an approach for estimating measurement uncertainty