1. Farr, H.W., Fahey, T.J., Nash, A.G., Farr, C.M.: Primary hyperparathyroidism and cancer. Am. J. Surg.126:539, 1973
2. Ackerman, N.B., Winer, N.: The differentiation of primary hyperparathyroidism from the hypercalcemia of malignancy. Ann. Surg.181:226, 1973
3. Samann, N.A., Hickey, R.C., Sethi, M.R., Yang, K.P., Wallace, S.: Hypercalcemia in patients with known malignant disease. Surgery80:382, 1976
4. Dent, C.E., Watson, L.: The hydrocortisone test in primary and tertiary hyperparathyroidism. Lancet1:662, 1968
5. Monchik, J.M., Martin, H.F.: Ionized calcium in the diagnosis of primary hyperparathyroidism. Surgery88:185, 1980