1. DeLuca HF. The metabolism, physiology, and function of vitamin D. In: Vitamin D, Basic and Clinical Aspects. Kumar R, ed. Boston: Nijhoff Publishing, 1984; 259–302.
2. Holick MF. Photobiology, metabolism, and clinical applications. In: Endocrinology, 3rd ed. DeGroot LJ, ed. Philadelphia: WB Saunders, 1995; 990–1013.
3. Reichel H, Koeffler HP, Norman AW. The role of the vitamin D endocrine system in health and disease. N Engl J Med 1989; 320: 981–991.
4. Mozolowski W. Jedrzej Sniadecki (1768–1883) on the cure of rickets. Nature 1939; 143: 121.
5. Palm TA. The geographic distribution and etiology of rickets. Practitioner 1890; 45: 270–279, 321–342.