1Administration on Aging.(2006).A profile of olderAmericans. [2007-12-15] .http://www.aoa.gov/prof/Statistics/profile/2006/ 2006profile.pdf.
2Chaparro, A., Rogers, M., Fernandez, J., Bohan, M., Chois, S.D., &Stumpfhauser, L.Range of motion of the wrist : Implicationgs for designing computer input devices for the elderly.Disability and Rehabilitation, 2000( 22 ) : 633-637.
3Bill&Melinda Gates Foundation. (2004).Toward equality of access:The role of public libraries in addressing the digital divide. [2008 -01-08].http ://www.gatesfoundation. org/nr/Dowmloads/libraries/uslibraries/reports/TowardEqualityofAccess.pdf.