6C. F. Njeh,C. M. Boivin,C. M. Langton. The role of ultrasound in the assessment of osteoporosis: A review[J] 1997,Osteoporosis International(1):7～22
7Dr. S. R. Lord,J. A. Ward,Williams P.,E. Zivanovic. The effects of a community exercise program on fracture risk factors in older women[J] 1996,Osteoporosis International(5):361～367
8Dr P. J. Ryan,G. M. Blake,R. Herd,J. Parker,I. Fogelman. Distribution of bone mineral density in the lumbar spine in health and osteoporosis[J] 1994,Osteoporosis International(2):67～71
9C. Andrew L. Bassett M. D.. Biologic significance of piezoelectricity[J] 1967,Calcified Tissue Research(1):252～272
