1. Walking patterns in healthy old men;Murray;J Gerontol,1969
2. Evaluation of functional capacity in activities of daily living in 70-year-old men and women;Aniansson;Scand J Rehabil Med,1980
3. Vital Statistics Mortality Data, Multiple Cause of Death Detail Hyattsville, MD US Department of Health and Human Services, Centers for Disease Control, National Center for Health Statistics