1. Harry, R.J. (1982) Harry’s Cosmeticology. 7th edn. Chapter 23, p. 397. Longmans, London.
2. Alexander, P. (1990) The structure of the hair. Manufacturing Chemist
61(2) 20.
3. Shaw, D.M. (1979) Hair lipid and surfactants. Int. J. Cosmet. Sci.
1(6) 317.
4. Weigmann, H.D. and Kamath, Y.K. (1986) Modification of human hair through fibre surface treatments: characterisation by wettability. Cosmet. Toilet.
101 (6) 37.
5. Tolgyesi, E. (1983) Weathering of hair. Cosmet. Toilet.
98(10) 29.