1. EEC. Council Directive 93/35/EEC of 14 June 1993 amending for the 6th time Directive 76/768/EEC on the approximation of the laws of the Member States relating to cosmetic products. OffJ Eur Comm L151:32-36 (1994).
2. Scala RA. Theoretical approaches to validation. In: Approaches to Validation. Alternative Methods in Toxicology. Vol 5 (Goldberg AM ed). New York:Mary Ann Liebert 1987;1-10.
3. Frazier JM. OECD Environment Monograph No. 36: Scientific Criteria for Validation of In Vitro Toxicology Tests 1990. Paris:Organisation for Economic Co-operation and Development 1990.
4. Report and recommendations of the CAAT/ERGATT Workshop on the Validation ofToxicity Test Procedures;Balls M;ATLA,1990
5. Balls M Blaauboer B Fentem JH Bruner L Combes RD Ekwall B Fielder RJ Guillouzo A Lewis RW Lovell DP etal Practical aspects of the Validation of Toxicity Test Procedures. The report and recommendations of ECVAM Workshop 5. ATLA23: 129-147 (1995).