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HEAD, Alison J; VAN HOECK, Michele; GARSON, Deborah S.. Lifelong learning in the digital age: A content analysis of recent research on participation. First Monday, [S.l.], feb. 2015. ISSN 13960466.
Available at: http://firstmonday.org/ojs/index.php/fm/article/view/5857/4210
Date accessed: 12 May. 2015.
doi:10.5210/fm.v20i2.5857.