1. Dawber RPR, de Berker DAR, Baran R (2001) Science of the nail apparatus. In: Baran R, Dawber RPR, De Berker DAR, Haneke E, Tosti A (eds) Baran and Dawber’s diseases of the nails and their management. Blackwell, Oxford, pp 1–47
2. Fleckman P (2005) Structure and function of the nail unit. In: Scher R, Daniel CR III (eds) Nails diagnosis therapy surgery. Elsevier Saunders, Shanghai, pp 13–25
3. de Berker DAR, Andre J, Baran R (2007) Nail biology and nail science. Int J Cosmet Sci 29(4):241–275
4. de Berker D, Forslind B (2004) The structure and properties of nails and periungual tissues. In: Forslind B, Linberg M, Norlén L (eds) Skin, hair, and nails, structure and function. Marcel Dekker, New York, NY, pp 409–464
5. Zaias N (1990) The nail in health and disease, 2nd edn. Appleton & Lange, Norwalk, CT