Xavier, L. ., S. Santos, P. Borralho, J. Rosado, J. A. Teixeira, J. Alcides, and J. Marques Ferreira. “An Unusual Type of Ovarian Tumour: Small Cell Carcinoma”. Internal Medicine, vol. 7, no. 3, Sept. 2000, pp. 161-4, https://revista.spmi.pt/index.php/rpmi/article/view/1997.