1. T. Garlanda and H. Masoero, La Chimica e l Industria, 1966, 48, 9, 936.

2. H. Masoero and T. Garlanda, La Chimica e l Industria , 1965, 4 7, 9, 973.

3. N. de Kruijf and M.A.H. Rijk, Food Additives and Contaminants , 1988, 5 , 467.

4. A.L. Baner, W. Bieber, K. Figge, R. Franz and O. Piringer, Food Additives and Contaminants, 1992, 9, 137.

5. I. Cooper, Food Additives and Contaminants , 1998, 1 5, 72.

6. A.L Baner, R. Franz and O. Piringer, Deutsche Lebensmittel-Rundschau , 1994, 90, 181.

7. A.L Baner, J. Brandsch, R. Franz and O. Piringer in the Proceedings of the 8th ICI/PIRA International Symposium on Plastics for Packaging Food, Washington, DC, USA, 1995.

8. A.L Baner, J. Brandsch, R. Franz and O. Piringer, Food Additives and Contaminants, 1996, 13, 5, 587.

9. T.H. Begley in Proceedings of the PIRA Conference on Plastics for Packaging Food, Prague, Czechoslovakia, 1997.

10. W. Limm and H.C. Hollifield, Food Additives and Contaminants , 1996, 1 3, 8, 949.

11. O. Piringer in Proceedings of the PIRA Conference on Plastics for Packaging Food, Prague, Czechoslovakia, 1997.

12. O. Piringer in Proceedings of the PIRA Conference on Plastics in Contact with Foodstuffs, London, UK, 1997.

13. A. O Brien, A. Goodson and I. Cooper, Food Additives and Contaminants , 1999, 16, 9, 367.

14. A. O Brien and I.