1. Ferreira FR, Costa Nascimento LF, Rotta O. Risk factors for non-melanoma skin cancer in Taubaté, Sao Paulo, Brazil: a case–control study. Rev Assoc Med Bras. 2011;57:424–30.
2. Harsh M. Text book of pathology, Published by Jaypee Brothers Medical Publishers (P) Ltd, Edition 3rd; 1998. p. 1009–1016.
3. Taveira SF, Lopez RFV. Topical administration of anticancer drugs for skin cancer treatment. Intech Open Access Publisher; 2011.
4. Beers M, Porter R, Jones T, Kaplan J, Berkwits M. The Merck manual of diagnosis and therapy. Whithouse Station: Merck Research Laboratories; 2006.
5. Russo T, Kasper D, Fauci A. Harrison’s principles of internal medicine. New York: McGraw-Hill; 2005. p. 937–9.