Pacheco, D., A. R. Travassos, L. Soares-Almeida, and R. Silva. “PIGMENTED VULVAR BASAL CELL CARCINOMA – RELEVANCE OF THE DIFFERENTIAL DIAGNOSIS IN OTHER PIGMENTED VULVAR LESIONS”. Journal of the Portuguese Society of Dermatology and Venereology, Vol. 71, no. 1, June 2013, pp. 123-6, doi:10.29021/spdv.71.1.136.