REFERENCES
- “ The European Standard EN 71–3:1994 ” . In Safety of toys Part 3. Specification for migration of certain elements
- 1999 . “ British Pharmacopoeia ” . In Appendix IA Vol. II , A47
- 1997 . Pharmacopoeia of The People Republic of China , English Edition Vol. 1 , 178
- Codex Alimentarius Commission, World Health Organization, Agenta Item 14(e), (1998) , CX/FAC 99/22 .