1. Stüttgen G, Ott A, Flesch U Measurement of skin microcirculation In: Cutaneous investigation in health and disease. J-L Leveque, ed, Marcel Dekker Inc, New York/Basel (1989) pp359–384
2. Berardesca E, Farinelli N, Rabbiosi G, Maibach HI Skin bioengineering in the noninvasive assessment of cutaneous aging. Dermatologica (1991) 182: 1 – 6
3. Normenausschuß Farbe im DIN Deutsches Institut für Normung eV Farbmessung, Farbmaßzahlen.DIN 5033 Teil 3 (1980)
4. Wilhelm KP, Maibach, HI Skin color reflectance measurements for objective quantification of erythema in human beings. J Am Acad Dermatol (1989) 21:1306–1308
5. Wilson DR, Maibach HI Transepidermal water loss: A review. In: Cutaneous investigation in health and disease. J-L Leveque, ed, Marcel Dekker Inc, New York/Basel (1989) pp113–152