1. The use of high centrifugal force in separating plasma calcium into its protein-bound and protein-free fractions;B-een, S.; M.; Freeman;Clin. chinm. Acta,1961
2. Plasma calcium distribution in relation to parathyroid function;Breen, M.; Freeman, S.;Amer. J. Physiol,1961
3. The binding of calcium by the plasma proteins in hyperparathyroidism;Dale, G.; E., N.; Kellerman, M.;Clin. Sci,1967
4. A determination of ionized calcium in serum by two-wavelength spectrophotometry of a metal indicator;Ettori, J.; Scoggan, S.M.;Clin. chim. Acta,1961
5. The ionized, complexed and protein-bound fractions of calcium in plasma;Fanconi, A.; Rose, G.A.;Quart. J. Med,1958