1. Online social networks: a survey of a global phenomenon;Heidemann;Comput. Netw.,2012
2. Understanding user behavior in online social networks: a survey;Jin;IEEE Commun. Mag.,2013
3. Most famous social network sites worldwide as of january 2017, ranked by number of active users (in millions), Statista, 2017. URL https://www.statista.com/statistics/272014/global-social-networks-ranked-by-number-of-users/.
4. E. LePage, All the social media advertising stats you need to know, 2016. URL https://blog.hootsuite.com/social-media-advertising-stats/.
5. Facebook’s advertising revenue worldwide from 2009 to 2016 (in million U.S. dollars), Statista, 2017. URL https://www.statista.com/statistics/271258/facebooks-advertising-revenue-worldwide/.