Francis Ries, Cristina Yanes Cabrera, Miguel Ángel Ballesteros Moscosio
International Journal for Cross-Disciplinary Subjects in Education (IJCDSE), Volume 5, Issue 2, June 2014
pp. 1661 - 1668
http://www.infonomics-society.org/IJCDSE/Contents%20Page%20Volume%205%20Issue%202 (documento inaccesible)
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