B. T. Adler, K. Chatterjee, L. De-alfaro, M. Faella, I. Pye et al., auto-scaling-scikit-learn-with-spark.html 16. http://www.inside-r.org/node/57517 17. http://pandas.pydata.org/pandas-docs/stable/generated/ pandas.DataFrame.html 18 Assigning trust to wikipedia content, Proceedings of the 4th International Symposium on Wikis, pp.1-2612, 2008.

O. Arazy and O. Nov, Determinants of wikipedia quality, Proceedings of the 2010 ACM conference on Computer supported cooperative work, CSCW '10, pp.233-236, 2010.
DOI : 10.1145/1718918.1718963

O. Arazy, O. Nov, R. Patterson, and L. Yeo, Information Quality in Wikipedia: The Effects of Group Composition and Task Conflict, Journal of Management Information Systems, vol.18, issue.2, pp.71-98, 2011.
DOI : 10.2753/MIS0742-1222270403

A. B. Bakker, K. I. Van-der-zee, K. A. Lewig, and M. F. Dollard, The Relationship Between the Big Five Personality Factors and Burnout: A Study Among Volunteer Counselors, The Journal of Social Psychology, vol.146, issue.1, pp.31-50, 2006.
DOI : 10.3200/SOCP.146.1.31-50

J. E. Blumenstock, Size matters, Proceeding of the 17th international conference on World Wide Web , WWW '08, pp.1095-1096, 2008.
DOI : 10.1145/1367497.1367673

L. Buriol, C. Castillo, D. Donato, S. Leonardi, and S. Millozzi, Temporal Evolution of the Wikigraph, Proceedings of Web Intelligence, pp.45-51, 2006.

N. Chawala, K. Bowyer, L. Hall, and W. Kegelmeyer, Smote : Synthetic minority over-sampleing technique, Journal of artificial intelligence research, vol.16, pp.321-357, 2002.

K. Crowston and J. Howison, Hierarchy and centralization in free and open source software team communications, Knowledge, Technology & Policy, vol.6, issue.5, pp.65-85, 2006.
DOI : 10.1007/s12130-006-1004-8

K. Crowston, J. Howison, and H. Annabi, Information system Success in Free and Open Source Software Development : Theory and Measures. Software Process Improvement and Practice, pp.123-148, 2006.

U. Fayyad, G. Piatetsky-shapiro, and P. Smyth, From data mining to knowledge discovery in databases. AI magazine, p.37, 1996.

O. Ferschke, D. Yang, and C. Rosé, A lightly supervised approach to role identification in wikipedia talk page discussions, 2015.

A. J. Flanagin and M. J. Metzger, FROM ENCYCLOP??DIA BRITANNICA TO WIKIPEDIA, Information, Communication & Society, vol.14, issue.3, pp.355-374, 2011.
DOI : 10.1080/1369118X.2010.542823

A. Forte, N. Kittur, V. Larco, H. Zhu, A. Bruckman et al., Coordination and beyond, Proceedings of the ACM 2012 conference on Computer Supported Cooperative Work, CSCW '12, pp.417-426, 2012.
DOI : 10.1145/2145204.2145270

C. Hess and E. Ostrom, Introduction : An Overview of the Knowledge Commons, Understanding Knowledge as a Commons. From Theory to Practice, pp.3-26, 2006.

N. Jullien, K. Crowston, and F. Ortega, The rise and fall of an online project, Proceedings of the 11th International Symposium on Open Collaboration, OpenSym '15, p.13, 2015.
DOI : 10.1145/2788993.2789844
URL : https://hal.archives-ouvertes.fr/hal-01192596

W. A. Katz, Introduction to reference work, Basic Information Services, 2002.

D. Lewandowski and U. Spree, Ranking of Wikipedia articles in search engines revisited: Fair ranking for reasonable quality?, Journal of the American Society for Information Science and Technology, vol.31, issue.2, pp.117-132, 2011.
DOI : 10.1002/asi.21423

X. Li, J. Tang, T. Wang, Z. Luo, and M. De-rijke, Automatically Assessing Wikipedia Article Quality by Exploiting Article???Editor Networks, Advances in Information Retrieval, pp.574-580, 2015.
DOI : 10.1007/978-3-319-16354-3_64

D. Lindsey, Evaluating quality control of Wikipedia's feature articles, First Monday, vol.15, issue.4, 2010.
DOI : 10.5210/fm.v15i4.2721

N. Lipka and B. Stein, Identifying featured articles in wikipedia, Proceedings of the 19th international conference on World wide web, WWW '10, pp.1147-1148, 2010.
DOI : 10.1145/1772690.1772847

R. Lopes and L. Carriço, The impact of accessibility assessment in macro scale universal usability studies of the web, Proceedings of the 2008 international cross-disciplinary workshop on Web accessibility (W4A) , W4A '08, pp.5-14, 2008.
DOI : 10.1145/1368044.1368048

G. Marwell and P. Oliver, The Critical Mass in Collective Action : A Micro-Social Theory, 1993.
DOI : 10.1017/CBO9780511663765

J. Mathieu, M. T. Maynard, T. Rapp, and L. Gilson, Team Effectiveness 1997-2007: A Review of Recent Advancements and a Glimpse Into the Future, Journal of Management, vol.85, issue.3, pp.410-476, 2008.
DOI : 10.1177/0149206308316061

X. Qin, P. Cunningham, and M. Salter-townshend, The influence of network structures of Wikipedia discussion pages on the efficiency of WikiProjects, Social Networks, vol.43, pp.1-15, 2015.
DOI : 10.1016/j.socnet.2015.04.002

F. Rullani and S. Haefliger, The periphery on stage: The intra-organizational dynamics in online communities of creation, Research Policy, vol.42, issue.4, pp.941-953, 2013.
DOI : 10.1016/j.respol.2012.10.008

B. Schölkopf, R. C. Williamson, A. J. Smola, J. Shawe-taylor, and J. C. Platt, Support vector method for novelty detection, NIPS, pp.582-588, 1999.

J. Solomon, R. W. Stein, and C. Hess, Critical mass of what ? exploring community growth in wikiprojects Does it matter who contributes -a study on featured articles in the german wikipedia, International AAAI Conference on Web and Social Media Hypertext 2007 : Proceedings of the Eighteenth ACM Conference on Hypertext and Hypermedia, HT'07, pp.171-174, 2007.

M. C. Sturman, Searching for the Inverted U-Shaped Relationship Between Time and Performance: Meta-Analyses of the Experience/Performance, Tenure/Performance, and Age/Performance Relationships, Journal of Management, vol.29, issue.5, pp.609-640, 2003.
DOI : 10.1016/S0149-2063(03)00028-X

B. Stvilia, A. Faraj, and Y. Yi, Issues of cross-contextual information quality evaluation???The case of Arabic, English, and Korean Wikipedias, Library & Information Science Research, vol.31, issue.4, pp.232-239, 2009.
DOI : 10.1016/j.lisr.2009.07.005

B. Stvilia, L. Gasser, M. B. Twidale, and L. C. Smith, A framework for information quality assessment, Journal of the American Society for Information Science and Technology, vol.12, issue.12, pp.1720-1733, 2007.
DOI : 10.1002/asi.20652

B. Stvilia, M. B. Twidale, L. C. Smith, and L. Gasser, Information quality work organization in wikipedia, Journal of the American Society for Information Science and Technology, vol.41, issue.6, pp.983-1001, 2008.
DOI : 10.1002/asi.20813

Y. Tan, V. Mookerjee, and P. Singh, Social capital, structural holes and team composition : Collaborative networks of the open source software community, ICIS 2007 Proceedings, p.155, 2007.

B. Uzzi, A social network's changing statistical properties and the quality of human innovation, Journal of Physics A: Mathematical and Theoretical, vol.41, issue.22, pp.224023-224035, 2008.
DOI : 10.1088/1751-8113/41/22/224023

F. B. Viégas, M. Wattenberg, J. Kriss, and F. Van-ham, Talk Before You Type: Coordination in Wikipedia, 2007 40th Annual Hawaii International Conference on System Sciences (HICSS'07), pp.78-87, 2007.
DOI : 10.1109/HICSS.2007.511

L. S. Wang, J. Chen, Y. Ren, and J. , Searching for the goldilocks zone, Proceedings of the ACM 2012 conference on Computer Supported Cooperative Work, CSCW '12, pp.989-998, 2012.
DOI : 10.1145/2145204.2145351

M. Warncke-wang, D. Cosley, and J. , Tell me more, Proceedings of the 9th International Symposium on Open Collaboration, WikiSym '13, pp.1-810, 2013.
DOI : 10.1145/2491055.2491063

W. Yang, W. Liu, A. Viña, M. Tuanmu, G. He et al., Nonlinear effects of group size on collective action and resource outcomes, Proceedings of the National Academy of Sciences, pp.11010916-10921, 2013.
DOI : 10.1073/pnas.1301733110