Calcium: what influences its level in the blood?

Cundy T. and Reid I. (1995). Calcium, phosphate and magnesium. In: Clinical Biocbemistry - metabolic and clinical aspects, 87-116 ( W J Marshall and S K Bangert , eds). New York, Edinburgh, London, Madrid, Melbourne, San Fransisco, Tokyo: Churchill Livingstone

Marshall W. (1995). Calcium, phosphate, magnesium and bone. In: Clinical Chemistry, 183-200. London: Mosby