1. Martindale. The extra pharmacopoeia. 29th ed. London: The Pharmaceutical Press, 1989:1522, caffeine.
2. Bordier PJ, Marie PJ, Arnaud CD: Evolution of renal osteodystrophy: Correlation of bone histomorphometry and serum mineral and immunoreactive parathyroid hormone values before and after treatment with calcium carbonate or 25-hydroxycholecalciferol. Kidney Int 7 (Suppl 2):102, 1975
3. Boris A: Structure-activity relationships of vitamin D analogues. Am J Med 62:543, 1977
4. Brancaccio D, Graziani G, Galmozzi C, Ponticelli C: 25-Hydroxy-vitamin-D deficiency and osteomalacia of chronic renal failure. Lancet I:199, 1977
5. Goodman and Gilman’s The pharmacological basis of therapeutics. 7th ed. New York: Macmillan, 1985: 1517, chapter 65, Agents affecting calcification: calcium, parathyroid hormone, calcitonin, vitamin D, and other compounds by RC Haynes and F Murad.