1. R. Dearing, Higher Education in the Learning Society – The Report of the National Committee of Inquiry into Higher Education, HMSO, 1997. .
2. Tele-learning: the “Killer App”?;Finley;IEEE Communications,1999
3. Harvard, MIT, EdX, 2012. .
4. Princeton, Stanford, Michegan, Pennsylvania, Coursera, 2012. .
5. Khan_Academy, Khan Academy, 2012. .