1. 1. Directive 2002/95/EC of the European parliament and of the council of 27 January 2003, on the restriction of the use of certain hazardous substances in electrical and electronic equipment, Official Journal of the European Union, 13. 2, 2003.
2. 2. Directive 2011/65/EC of the European parliament and of the council of 8 June 2011, on the restriction of the use of certain hazardous substances in electrical and electronic equipment (recast), Official Journal of the European Union,citation= 1. 7, 2011.
3. 3. W. V. Borm, A. Lambery, and P. Quevauviller, Fresenius J. Anal. Chem., 1999, 365, 361.
4. Producing SI-traceable reference values for Cd, Cr and Pb amount contents in polyethylene samples from the Polymer Elemental Reference Material (PERM) project using isotope dilution mass spectrometry
5. 5. P. Quevauviller, Trend Anal. Chem., 2001, 20, 446.