1. Computer use by older adults: A multi-disciplinary review
2. Eurostat Regional Yearbook
http://ec.europa.eu/eurostat/statistics-explained/index.php/Online_publications
3. Active Ageing and Solidarity between Generations: A Statistical Portrait of the European Union,2011
4. The Wide Range of Abilities and Its Impact on Computer Technology,2003
5. Facts and Figures about Disability
http://www.edf-feph.org/Page_Generale.asp?DocID=12534