1. Arnaud, C.D., H.S. Tsao and T. Littledicke (1971): Radioimmunoassay of Human Parathyroid Hormone in Serum. 3. Clin. Invest. 50, 21–34.
2. Better, O.S., C.R. Kleeman, H.C. Gonicke, P.D. Varraday and H.M. Maywell (1976): Renal handling of Ca, Mg and Pi in chronic renal failure. Israel 3. Med. Sci. 3, 60–70.
3. Bikle, D.D. and H. Rasmussen (1973): Ionic control of l,25(OH)2D3 production in the chick kidney tubule. 3. Clin. Invest. 52, 9a.
4. Binswanger, U. and J.A. Fischer (1974): Response of Immunoreactive Parathyroid Hormone to Intravenous Phosphate Infusion in Primary Hyperparathyroidism. Klin. Wschr. 52, 30–32.
5. Issa, S., M. Kluckhuhn, E. Keck and H. v. Lilienfeld-Toal (1982): Consequence of Phosphate Loading in Normal Man. In: A.W. Norman et al. (eds): Vitamin D, Chemical, Biochemical and Clinical Endocrinology of Calcium Metabolism, p. 557–559. De Gruyter, Berlin - New York.