1. Quirk, P.W.: Iran’s Twitter Revolution. Foreign Policy in Focus (June 17, 2009), http://www.fpif.org/articles/irans_twitter_revolution
2. Masr, B.: Stop, Look, What’s that Sound – The Death of Egyptian Activism (February 8, 2009), http://bikyamasr.wordpress.com/2009/08/02/bm-opinion-stop-look-whats-that-sound-the-death-of-egyptian-activism/
3. Tarrow, S.: Power in Movement: Social Movements and Contentious Politics. Cambridge University Press, Cambridge (1998)
4. Berry, J.: The Interest Group Society. Little Brown, Boston (1984)
5. Olson, M.: The Logic of Collective Action. Harvard University Press, Cambridge (1965)