Ventura, A., Ribeiro, J., Murinello, A., Amado, L., Morgado, A., Guerra, C., Murinello, F., Silva, J. L. and Mota, J. A. (1989) “Von Recklinghausen neurofibromatosis and malignant pheochromocytoma: presentation of 3 cases”., Acta Médica Portuguesa. Lisbon, Portugal, 2(2), pp. 83–8. doi: 10.20344/amp.3466.