1. Merck & Co. Inc. The marck index. 13th ed. Kenilworth; 2001.
2. Niemann A. Sur l’alcoloide de coca. J Pharmacol. 1860;34:474–5.
3. Woolfson AD, McCafferty DF. Local anaesthetics. In: Woolfson AD, McCafferty DF, editors. Percutaneous local anaesthesia. New York: Ellis Horwood Ltd.; 1993. p. 54–94.
4. Maibach HI, Surber C. Topical corticosteroids. Basel: Karger; 1992.
5. Woods GF. Evolution of the anti-inflammatory steroids. Organ. 1978;15:1–6.