Anderson, J. B.,Sjöberg, H. E.(2001).Dietary calcium and bone health in the elderly: Uncertainties about reconnendations.Nutrition Research.21,263-268.
Bassey, E. J.,Ramsdale, S. J.(1995).Weight-bearing exercise and ground reaction forces: A 12-month randomized controlled trail of effects on bone mineral density in healthy postmenopausal women.Bone.16(4),496-76.