1. Graham JA, Kligman AM (1985) Physical attractiveness, cosmetic use and self perception in the elderly Int J Cosmet Sci 7 /2: 85–98
2. Hashimoto K (1974) New methods for surface ultrastructure: comparative studies or scanning electron microscopy, transmission electron microscopy and replica method. Int J Dermatol 13: 357–381
3. Feder M, Burggren W (1986) Comment respire la peau des vertébrés. Science Jan: 68–77
4. Corcuff P, de Rigal J., Leveque JL (1982) Image analysis of the cutaneous microrelief. Inter-national conference on bioengineering and the skin, Philadelphia, 1981. Bioeng Skin 4 1: 16–31
5. Langer K (1978) On the anatomy and physiology of the skin Br J Plast Surg 31: 3–8, 96–106, 185–199