1. Verpackung mit Kunststoffen;Ahlhaus,1997
2. Electrical properties of polymers;Blythe,2005
3. Recycling and recovery of plastics;Brandrup,1996
4. Opakowania żywności;Czerniawski,1998
5. Directive 94 '62-EC of 20 December 1994 on packaging and packaging waste.