M. Richardson and P. Domingos, Mining knowledge-sharing sites for viral marketing, Proceedings of the eighth ACM SIGKDD international conference on Knowledge discovery and data mining , KDD '02, 2002.
DOI : 10.1145/775047.775057

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=

W. Yang, J. Dia, H. Cheng, and H. Lin, Mining social networks for targeted advertising, 39th Hawaii International Conf, 2006.

J. Surowieck, The Wisdom of Crowds, Anchor, 2005.

D. M. Boyd and N. B. Ellison, Social Network Sites: Definition, History, and Scholarship, Journal of Computer-Mediated Communication, vol.3, issue.1, p.210, 2007.
DOI : 10.1504/IJWBC.2005.008111

D. Koller, Representation, reasoning and learning, 2001.

D. Fono and K. Raynes-goldie, Hyperfriends and beyond: Friendship and social norms on livejournal, Internet Research Annual, vol.4, 2006.

K. Raynes-goldie, Pulling sense out of today???s informational chaos: LiveJournal as a site of knowledge creation and sharing, First Monday, vol.9, issue.12, 2004.
DOI : 10.5210/fm.v9i12.1194

N. B. Ellison, C. Steinfield, and C. Lampe, The Benefits of Facebook ???Friends:??? Social Capital and College Students??? Use of Online Social Network Sites, Journal of Computer-Mediated Communication, vol.22, issue.3, pp.1143-1168, 2007.
DOI : 10.1145/358916.361990

M. Granovetter, The strength of weak ties, Am. J. of Sociology, vol.78, 1973.

A. Mislove, M. Marcon, K. Gummadi, P. Druschel, and B. Bhattacharjee, Measurement and analysis of online social networks, Proceedings of the 7th ACM SIGCOMM conference on Internet measurement , IMC '07, 2007.
DOI : 10.1145/1298306.1298311

J. Leskovec and E. Horvitz, Planetary-scale views on a large instant-messaging network, Proceeding of the 17th international conference on World Wide Web , WWW '08, 2008.
DOI : 10.1145/1367497.1367620

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=

M. Cha, A. Mislove, and K. P. Gummadi, A measurement-driven analysis of information propagation in the flickr social network, Proceedings of the 18th international conference on World wide web, WWW '09, 2009.
DOI : 10.1145/1526709.1526806

M. Cha, H. Kwak, P. Rodriguez, Y. Ahn, and S. Moon, Analyzing the video popularity characteristics of large-scale user generated content systems, IEEE/ACM Transactions on Networking, 2009.

E. B. Keller and J. Berry, The Influentials: One American in Ten Tells the Other Nine How to Vote, Where to Eat, and what to Buy, 2003.

Y. Y. Ahn, S. Han, H. Kwak, S. Moon, and H. Jeong, Analysis of topological characteristics of huge online social networking services, Proceedings of the 16th international conference on World Wide Web , WWW '07, 2007.
DOI : 10.1145/1242572.1242685

L. Rüschendorf, The Wasserstein distance and approximation theorems, Probability Theory and Related Fields, vol.28, issue.7, 1985.
DOI : 10.1137/1128025

J. P. Scott, Social Network Analysis: A Handbook, Sage, 2000.
DOI : 10.4135/9781446294413

F. Benevenuto, T. Rodrigues, M. Cha, and V. Almeida, Characterizing user behavior in online social networks, Proceedings of the 9th ACM SIGCOMM conference on Internet measurement conference, IMC '09, 2009.
DOI : 10.1145/1644893.1644900

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=

M. O. Lorentz, Methods of Measuring the Concentration of Wealth, Publications of the American Statistical Association, vol.9, issue.70, pp.209-219, 1905.
DOI : 10.2307/2276207

H. A. Simon, On a class of skew distribution functions, Biometrika, 1955.

P. Csermely, Weak Links: Stabilizers of Complex Systems from Proteins to Social Networks, 2006.
DOI : 10.1007/978-3-540-31157-7