1. Anon. (1983). Pharmaceutical Journal, 230, 300.
2. Baird, R.M. This volume, pp. 152–6.
3. Beveridge, E.G. (1975). In Microbial Aspects of the Deterioration of Materials, SAB Technical Series No. 9, ed. D.W. Lovelock & R.J. Gilbert. Academic Press, London, pp. 213–35.
4. Beveridge, E.G. (1983). In Pharmaceutical Microbiology, 3rd edition, ed. W.B. Hugo & A.D. Russell, Blackwell Scientific Publications, Oxford, pp. 334–53.
5. Cox, P.H. & Sewell, B.A. (1968). Journal of the Society for Cosmetic Chemists, 19, 461–7.