Ashburner, J. M., Cauley, J. A., Cawthon, P., Ensrud, K. E., Hochberg, M. C., & Fredman, L. (2011). Self-ratings of Health and Change in Walking Speed Over 2 Years: Results From the Caregiver-Study of Osteoporotic Fractures. Oxford University Press.

Ashburner, Jeffrey M., Jane A. Cauley, Peggy Cawthon, Kristine E. Ensrud, Marc C. Hochberg, και Lisa Fredman. Self-ratings of Health and Change in Walking Speed Over 2 Years: Results From the Caregiver-Study of Osteoporotic Fractures. Oxford University Press, 2011.

Ashburner, Jeffrey M., et al. Self-ratings of Health and Change in Walking Speed Over 2 Years: Results From the Caregiver-Study of Osteoporotic Fractures. Oxford University Press, 2011.