1. Bacon HE, Pena E: Malignant melanoma of the anorectum: Report of two cases. Clinics 3: 457, 1944
2. Baxter H: Malignant melanoma in the coloured races: Report of a case originating in the mouth. Can Med Assoc J 41: 350, 1939
3. Behrend M, Behrend A: Melanosarcoma (malignant melanoma) of the rectosigmoid: Report of a unique case. Gastroenterology 12: 142, 1949
4. Bonnet P, Chalier A: Mélanose généralisé à point de départ ano-rectal. Lyon Med 116: 917, 1911
5. Braastad FW, Dockerty MB, Dixon CF: Melanoepithelioma of the anus and rectum: Report of cases and review of literature. Surgery 25: 82, 1949.