1. Potts, J.T., Jr., Deftos,L.: Parathyroid hormone, thyrocalcitonin, vitamin D, bone and bone mineral metabolism. In Duncan’s diseases of metabolism, 6th ed. Philadelphia: Saunders 1969.
2. Rasmussen, H.: The parathyroids. In: Williams, R.H. (ed.), Textbook of endocrinology, 4th ed. Philadelphia: Saunders 1968.
3. For earher literature see: Wernly, M. In: Labhart, Klinik der inneren Sekretion, p. 939. Berlin-Göttingen-Heidelberg: Springer 1957.
4. Berson, S.A., Yalow, R.S.: Clinical apphcations of plasma parathyroid hormone. Amer. J. Med. 50, 623 (1971).
5. Cope, O.: The story of hyperparathyroidism at the Massachusetts General Hospital. New Engl. J. Med. 274, 1174(1966).