1. Wilhelm, E.J., US Patent 2,035,380.
2. Johnson, D.M., US Patent 2,559,878.
3. Directive 2000/53/EC of the European Parliament and of the Council of 18th of Sept. 2000, on end-of-live-vehicles.
4. Directive 2002/95/EG of the European Parliament and of the Council of 27th of Jan. 2003.
5. Directive 2002/96/EC of the European Parliament and of the Council of the 27th of Jan. 2003, on waste electrical and electronic equipment.