1) John H, Sippie MD: The associatiion of pheochromocytoma with carcinoma of the thyroid gland. Am J Med 31: 163-166, 1961
2) Steiner AL, Goodman AD, Powers SR: Study of a kindred with pheochromo cytoma, medullary thyroid carcinoma, hyperparathyroidism and Cushing's disease: Multiple endocarcine neoplasia, type 2. Medicine 47: 371-409, 1968
3) Williams ED: A review of 17 cases of carcinoma of the thyroid and pheochromocytoma. J Clin Pathol 18: 288-292, 1965