References

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Barrington, G.M., 2000. Parturient Paresis in Cows. In: The Merck Veterinary Manual, Aiello, S.E. (Ed.). 8th Edn., Merck and Co. Inc., Whitehouse Station, New Jersey, ISBN: 9780911910803.

Burnett, R.W., T.F. Christiansen, A.K. Covington, N. Fogh-Andersen and W.R. Kulpmann et al., 2000. IFCC recommended reference method for the determination of the substance concentration of ionized calcium in undiluted serum, plasma or whole blood. Clin. Chem. Lab. Med., 38: 1301-1314.
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Clark, G.W., 1920. Effect of hypodermic and oral administration of calcium salts on the calcium content of rabbit blood. J. Biol. Chem., 43: 89-95.

Kramer, B. and F.F. Tisdall, 1921. A simple technique for the determination of calcium and magnesium in small amounts of serum. J. Biol. Chem., 47: 475-481.
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Radostits, O.M., C.C. Gay, D.C. Blood and K.W. Hinchcliff, 2000. Production Diseases, Veterinary Medicine. 9th Edn., W.B. Saunders, Philadelphia, pp: 1420-1434.

Ward, G.M., R.C. Lindsay and C.A. Vain, 1960. Calcium and magnesium determination in bovine blood by EDTA titration. J. Dairy Sci., 43: 1014-1015.
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Webster, W.W. Jr., 1962. A simple microspectrophotometric method for the determination of serum/plasma calcium. Tech. Bull. Registry Med. Technol., 32: 32-35.