Gomes, H., Lebre, R., Fonseca, J., Borralho, P., & Duarte, R. (1997). Adenocarcinoma of the Vater’s ampulla associated with Von Recklinghausen’s neurofibromatosis. Acta Médica Portuguesa, 10(11), 832–6. https://doi.org/10.20344/amp.2506