1. Involutional osteoporosis;Riggs;N Engl J Med,1986
2. The parathyroid glands and metabolic bone disease;Albright,1948
3. Cortical and trabecular osteoporosis and their relation to fractures in the elderly;Horsman,1981
4. Bone histomorphometry in osteoporotic states;Meunier,1979
5. Evidence for two distinct syndromes of involutional osteoporosis;Riggs;Am J Med,1984