1. Egypt Unshackled: Using Social Media to @#:) the System;Campbell,2011
2. Predicting elections with Twitter: what 140 characters reveal about political sentiment;Tumasjan,2010
3. Limits of electoral predictions using Twitter;Gayo-Avello,2011
4. Big questions for social media big data: representativeness, validity and other methodological pitfalls;Tufekci,2014
5. The Demographics of Social Media Users, 2012;Duggan,2013