1. 1. Solomon L. Bone loss in ageing individuals. Orthopaedics 1978;6:121.
2. 2. Hodsman AB, Drost DJ, Goldenberg J. Reduced vertebral fracture rates in osteoporotic patients responding to fluoride treatment with an increasing vertebral bone mineral density. In: Christian Sen C, overgaard K, eds. Osteoporosis. Copenhagen osteopress APS, 1990;1484-1485.
3. 3. The Merk manual of diagnosis and therapy. Section 5 Musculoskeletal and connective tissue disorders. chapter 57, osteoporosis. pg 450.
4. 4. Mercer's orthopaedic surgery by Robert Duthie and George Bentley, 9th edn:pg 312.
5. 5. Orimo H, Shiraki M, Inoue S. Oestrogen and bone. Osteoporosis Int 1993;3(I):153-156.