1. ASTM E 1174-94. Standard Test Method for Evaluation of Health Care Personnel Handwash Formulation. Philadelphia: American Society for Testing and Materials.
2. ASTM E 1327-90 (reapproved 1995). Standard Test Method for Evaluation of Health Care Personnel Handwash Formulations by Utilizing Fingernail Regions. Philadelphia: American Society for Testing and Materials.
3. Baird, R. M., 1977. Microbial contamination of cosmetic products. J. Soc. Cosmet. Chem. 28, 17–20
4. Baird, R. M., 1984. Bacteriological contamination of products used for skin care on babies. Int. J. Cosm. Sci., 6, 85–90
5. BP, 1980. British Pharmacopoeia. Vol. II, appendix XVIc, A193–19.