1. Primary hyperparathyroidism: a prospective clinical study;Purnell;Am J Med,1971
2. The colorimetric determination of phosphorus;Fiske;J Biol Chem,1925
3. Uber den Niederschlag, welchen Pikrinsaüre in normalen Harn erzeugt ünd eine neue Reaction des Kreatinins;Jaffé;Z Physiol Chem (Hoppe-Seyler's),1886
4. The relation of age and sex to distribution of values in healthy adults of serum calcium, inorganic phosphorus, magnesium, alkaline phosphatase, total proteins, albumin and blood urea;Keating;J Lab Clin Med,1969
5. Radioimmunoassay of human parathyroid hormone in serum;Arnaud;J Clin Invest,1971